Normalize names of some source files

Most tdep/nat files are named:

  <cpu>-<os>-tdep.c
  <cpu>-<os>-nat.c

A few files do not respect this scheme.  This patch renames them so that
they are consistent with the rest of the files.  It builds fine with
--enable-targets=all, but that doesn't test the nat files.  I can only
hope that my grep skill is good enough.

gdb/ChangeLog:

	* Makefile.in (ALL_64_TARGET_OBS, ALL_TARGET_OBS,
	HFILES_NO_SRCDIR, ALLDEPFILES): Rename files.
	* alphabsd-nat.c: Rename to ...
	* alpha-bsd-nat.c: ... this, adjust include.
	* alphabsd-tdep.c: Rename to ...
	* alpha-bsd-tdep.c: ... this, adjust include.
	* alphabsd-tdep.h: Rename to ...
	* alpha-bsd-tdep.h: ... this, adjust include barrier and comment.
	* alphafbsd-tdep.c: Rename to ...
	* alpha-fbsd-tdep.c: ... this.
	* alphanbsd-tdep.c: Rename to ...
	* alpha-nbsd-tdep.c: ... this, adjust include.
	* alphaobsd-tdep.c: Rename to ...
	* alpha-obsd-tdep.c: ... this, adjust include.
	* amd64bsd-nat.c: Rename to ...
	* amd64-bsd-nat.c: ... this, adjust include.
	* amd64fbsd-nat.c: Rename to ...
	* amd64-fbsd-nat.c: ... this, adjust include.
	* amd64fbsd-tdep.c: Rename to ...
	* amd64-fbsd-tdep.c: ... this, adjust include.
	* amd64nbsd-nat.c: Rename to ...
	* amd64-nbsd-nat.c: ... this.
	* amd64nbsd-tdep.c: Rename to ...
	* amd64-nbsd-tdep.c: ... this.
	* amd64obsd-nat.c: Rename to ...
	* amd64-obsd-nat.c: ... this.
	* amd64obsd-tdep.c: Rename to ...
	* amd64-obsd-tdep.c: ... this.
	* amd64-tdep.h: Update comments.
	* armbsd-tdep.c: Rename to ...
	* arm-bsd-tdep.c: ... this.
	* armnbsd-nat.c: Rename to ...
	* arm-nbsd-nat.c: ... this.
	* armnbsd-tdep.c: Rename to ...
	* arm-nbsd-tdep.c: ... this.
	* armobsd-tdep.c: Rename to ...
	* arm-obsd-tdep.c: ... this.
	* arm-tdep.h: Update comments.
	* hppabsd-tdep.c: Rename to ...
	* hppa-bsd-tdep.c: ... this, adjust include.
	* hppabsd-tdep.h: Rename to ...
	* hppa-bsd-tdep.h: ... this, adjust include barrier and comment.
	* hppanbsd-nat.c: Rename to ...
	* hppa-nbsd-nat.c: ... this.
	* hppanbsd-tdep.c: Rename to ...
	* hppa-nbsd-tdep.c: ... this, adjust include.
	* hppaobsd-nat.c: Rename to ...
	* hppa-obsd-nat.c: ... this.
	* hppaobsd-tdep.c: Rename to ...
	* hppa-obsd-tdep.c: ... this, adjust include.
	* i386bsd-nat.c: Rename to ...
	* i386-bsd-nat.c: ... this, adjust include.
	* i386bsd-nat.h: Rename to ...
	* i386-bsd-nat.h: ... this, adjust include barrier and comment.
	* i386bsd-tdep.c: Rename to ...
	* i386-bsd-tdep.c: ... this.
	* i386fbsd-nat.c: Rename to ...
	* i386-fbsd-nat.c: ... this, adjust include.
	* i386fbsd-tdep.c: Rename to ...
	* i386-fbsd-tdep.c: ... this, adjust include.
	* i386fbsd-tdep.h: Rename to ...
	* i386-fbsd-tdep.h: ... this, adjust include barrier and comment.
	* i386gnu-nat.c: Rename to ...
	* i386-gnu-nat.c: ... this.
	* i386gnu-tdep.c: Rename to ...
	* i386-gnu-tdep.c: ... this.
	* i386nbsd-nat.c: Rename to ...
	* i386-nbsd-nat.c: ... this, adjust include.
	* i386nbsd-tdep.c: Rename to ...
	* i386-nbsd-tdep.c: ... this.
	* i386obsd-nat.c: Rename to ...
	* i386-obsd-nat.c: ... this, adjust include.
	* i386obsd-tdep.c: Rename to ...
	* i386-obsd-tdep.c: ... this.
	* i386v4-nat.c: Rename to ...
	* i386-v4-nat.c: ... this.
	* i386-tdep.h: Update comments.
	* m68k-tdep.h: Update comments.
	* m68kbsd-nat.c: Rename to ...
	* m68k-bsd-nat.c: ... this.
	* m68kbsd-tdep.c: Rename to ...
	* m68k-bsd-tdep.c: ... this.
	* m68klinux-nat.c: Rename to ...
	* m68k-linux-nat.c: ... this.
	* m68klinux-tdep.c: Rename to ...
	* m68k-linux-tdep.c: ... this.
	* m88kbsd-nat.c: Rename to ...
	* m88k-bsd-nat.c: ... this.
	* mipsnbsd-nat.c: Rename to ...
	* mips-nbsd-nat.c: ... this, adjust include.
	* mipsnbsd-tdep.c: Rename to ...
	* mips-nbsd-tdep.c: ... this, adjust include.
	* mipsnbsd-tdep.h: Rename to ...
	* mips-nbsd-tdep.h: ... this, adjust include barrier and comment.
	* mips64obsd-nat.c: Rename to ...
	* mips64-obsd-nat.c: ... this.
	* mips64obsd-tdep.c: Rename to ...
	* mips64-obsd-tdep.c: ... this.
	* ppcfbsd-nat.c: Rename to ...
	* ppc-fbsd-nat.c: ... this, adjust include.
	* ppcfbsd-tdep.c: Rename to ...
	* ppc-fbsd-tdep.c: ... this, adjust include.
	* ppcfbsd-tdep.h: Rename to ...
	* ppc-fbsd-tdep.h: ... this, adjust include barrier and comment.
	* ppcnbsd-nat.c: Rename to ...
	* ppc-nbsd-nat.c: ... this, adjust include.
	* ppcnbsd-tdep.c: Rename to ...
	* ppc-nbsd-tdep.c: ... this, adjust include.
	* ppcnbsd-tdep.h: Rename to ...
	* ppc-nbsd-tdep.h: ... this, adjust include barrier and comment.
	* ppcobsd-nat.c: Rename to ...
	* ppc-obsd-nat.c: ... this, adjust include.
	* ppcobsd-tdep.c: Rename to ...
	* ppc-obsd-tdep.c: ... this, adjust include.
	* ppcobsd-tdep.h: Rename to ...
	* ppc-obsd-tdep.h: ... this, adjust include barrier and comment.
	* shnbsd-nat.c: Rename to ...
	* sh-nbsd-nat.c: ... this.
	* shnbsd-tdep.c: Rename to ...
	* sh-nbsd-tdep.c: ... this.
	* sparcnbsd-nat.c: Rename to ...
	* sparc-nbsd-nat.c: ... this.
	* sparcnbsd-tdep.c: Rename to ...
	* sparc-nbsd-tdep.c: ... this.
	* sparcobsd-tdep.c: Rename to ...
	* sparc-obsd-tdep.c: ... this.
	* sparc64fbsd-nat.c: Rename to ...
	* sparc64-fbsd-nat.c: ... this.
	* sparc64fbsd-tdep.c: Rename to ...
	* sparc64-fbsd-tdep.c: ... this.
	* sparc64nbsd-nat.c: Rename to ...
	* sparc64-nbsd-nat.c: ... this.
	* sparc64nbsd-tdep.c: Rename to ...
	* sparc64-nbsd-tdep.c: ... this.
	* sparc64obsd-nat.c: Rename to ...
	* sparc64-obsd-nat.c: ... this.
	* sparc64obsd-tdep.c: Rename to ...
	* sparc64-obsd-tdep.c: ... this.
	* sparc64-tdep.h: Update comments.
	* vaxbsd-nat.c: Rename to ...
	* vax-bsd-nat.c: ... this.
	* vaxnbsd-tdep.c: Rename to ...
	* vax-nbsd-tdep.c: ... this.
	* vaxobsd-tdep.c: Rename to ...
	* vax-obsd-tdep.c: ... this.
	* x86bsd-nat.h: Rename to ...
	* x86-bsd-nat.h: ... this, adjust include barrier and comment.
	* x86bsd-nat.c: Rename to ...
	* x86-bsd-nat.c: ... this, adjust include.
	* configure.tgt: Update renamed files.
	* config/alpha/fbsd.mh: Update renamed files.
	* config/alpha/nbsd.mh: Update renamed files.
	* config/arm/nbsdelf.mh: Update renamed files.
	* config/djgpp/fnchange.lst: Update renamed files.
	* config/i386/fbsd.mh: Update renamed files.
	* config/i386/fbsd64.mh: Update renamed files.
	* config/i386/i386gnu.mh: Update renamed files.
	* config/i386/i386sol2.mh: Update renamed files.
	* config/i386/nbsd64.mh: Update renamed files.
	* config/i386/nbsdelf.mh: Update renamed files.
	* config/i386/obsd.mh: Update renamed files.
	* config/i386/obsd64.mh: Update renamed files.
	* config/i386/sol2-64.mh: Update renamed files.
	* config/m68k/linux.mh: Update renamed files.
	* config/m68k/nbsdelf.mh: Update renamed files.
	* config/m68k/obsd.mh: Update renamed files.
	* config/m88k/obsd.mh: Update renamed files.
	* config/mips/nbsd.mh: Update renamed files.
	* config/mips/obsd64.mh: Update renamed files.
	* config/pa/nbsd.mh: Update renamed files.
	* config/pa/obsd.mh: Update renamed files.
	* config/powerpc/fbsd.mh: Update renamed files.
	* config/powerpc/nbsd.mh: Update renamed files.
	* config/powerpc/obsd.mh: Update renamed files.
	* config/sh/nbsd.mh: Update renamed files.
	* config/sparc/fbsd.mh: Update renamed files.
	* config/sparc/nbsd64.mh: Update renamed files.
	* config/sparc/nbsdelf.mh: Update renamed files.
	* config/sparc/obsd64.mh: Update renamed files.
	* config/vax/nbsdelf.mh: Update renamed files.
	* config/vax/obsd.mh: Update renamed files.

1 files changed, 542 insertions, 0 deletions

diff --git a/gdb/m68k-linux-nat.c b/gdb/m68k-linux-nat.c
new file mode 100644
index 00000000000..5b8684b7197
--- /dev/null
+++ b/gdb/m68k-linux-nat.c
@@ -0,0 +1,542 @@
+/* Motorola m68k native support for GNU/Linux.
+
+   Copyright (C) 1996-2016 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 "frame.h"
+#include "inferior.h"
+#include "language.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "target.h"
+#include "linux-nat.h"
+
+#include "m68k-tdep.h"
+
+#include <sys/dir.h>
+#include <signal.h>
+#include "nat/gdb_ptrace.h"
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <sys/procfs.h>
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+#include <sys/file.h>
+#include <sys/stat.h>
+
+#include "floatformat.h"
+
+/* Prototypes for supply_gregset etc.  */
+#include "gregset.h"
+
+/* Defines ps_err_e, struct ps_prochandle.  */
+#include "gdb_proc_service.h"
+
+#ifndef PTRACE_GET_THREAD_AREA
+#define PTRACE_GET_THREAD_AREA 25
+#endif
+
+/* This table must line up with gdbarch_register_name in "m68k-tdep.c".  */
+static const int regmap[] =
+{
+  PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
+  PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
+  PT_SR, PT_PC,
+  /* PT_FP0, ..., PT_FP7 */
+  21, 24, 27, 30, 33, 36, 39, 42,
+  /* PT_FPCR, PT_FPSR, PT_FPIAR */
+  45, 46, 47
+};
+
+/* Which ptrace request retrieves which registers?
+   These apply to the corresponding SET requests as well.  */
+#define NUM_GREGS (18)
+#define MAX_NUM_REGS (NUM_GREGS + 11)
+
+static int
+getregs_supplies (int regno)
+{
+  return 0 <= regno && regno < NUM_GREGS;
+}
+
+static int
+getfpregs_supplies (int regno)
+{
+  return M68K_FP0_REGNUM <= regno && regno <= M68K_FPI_REGNUM;
+}
+
+/* Does the current host support the GETREGS request?  */
+static int have_ptrace_getregs =
+#ifdef HAVE_PTRACE_GETREGS
+  1
+#else
+  0
+#endif
+;
+
+
+
+/* Fetching registers directly from the U area, one at a time.  */
+
+/* Fetch one register.  */
+
+static void
+fetch_register (struct regcache *regcache, int regno)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  long regaddr, val;
+  int i;
+  gdb_byte buf[MAX_REGISTER_SIZE];
+  int tid;
+
+  /* Overload thread id onto process id.  */
+  tid = ptid_get_lwp (inferior_ptid);
+  if (tid == 0)
+    tid = ptid_get_pid (inferior_ptid);	/* no thread id, just use
+					   process id.  */
+
+  regaddr = 4 * regmap[regno];
+  for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long))
+    {
+      errno = 0;
+      val = ptrace (PTRACE_PEEKUSER, tid, regaddr, 0);
+      memcpy (&buf[i], &val, sizeof (long));
+      regaddr += sizeof (long);
+      if (errno != 0)
+	error (_("Couldn't read register %s (#%d): %s."), 
+	       gdbarch_register_name (gdbarch, regno),
+	       regno, safe_strerror (errno));
+    }
+  regcache_raw_supply (regcache, regno, buf);
+}
+
+/* Fetch register values from the inferior.
+   If REGNO is negative, do this for all registers.
+   Otherwise, REGNO specifies which register (so we can save time).  */
+
+static void
+old_fetch_inferior_registers (struct regcache *regcache, int regno)
+{
+  if (regno >= 0)
+    {
+      fetch_register (regcache, regno);
+    }
+  else
+    {
+      for (regno = 0;
+	   regno < gdbarch_num_regs (get_regcache_arch (regcache));
+	   regno++)
+	{
+	  fetch_register (regcache, regno);
+	}
+    }
+}
+
+/* Store one register.  */
+
+static void
+store_register (const struct regcache *regcache, int regno)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  long regaddr, val;
+  int i;
+  int tid;
+  gdb_byte buf[MAX_REGISTER_SIZE];
+
+  /* Overload thread id onto process id.  */
+  tid = ptid_get_lwp (inferior_ptid);
+  if (tid == 0)
+    tid = ptid_get_pid (inferior_ptid);	/* no thread id, just use
+					   process id.  */
+
+  regaddr = 4 * regmap[regno];
+
+  /* Put the contents of regno into a local buffer.  */
+  regcache_raw_collect (regcache, regno, buf);
+
+  /* Store the local buffer into the inferior a chunk at the time.  */
+  for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long))
+    {
+      errno = 0;
+      memcpy (&val, &buf[i], sizeof (long));
+      ptrace (PTRACE_POKEUSER, tid, regaddr, val);
+      regaddr += sizeof (long);
+      if (errno != 0)
+	error (_("Couldn't write register %s (#%d): %s."),
+	       gdbarch_register_name (gdbarch, regno),
+	       regno, safe_strerror (errno));
+    }
+}
+
+/* Store our register values back into the inferior.
+   If REGNO is negative, do this for all registers.
+   Otherwise, REGNO specifies which register (so we can save time).  */
+
+static void
+old_store_inferior_registers (const struct regcache *regcache, int regno)
+{
+  if (regno >= 0)
+    {
+      store_register (regcache, regno);
+    }
+  else
+    {
+      for (regno = 0;
+	   regno < gdbarch_num_regs (get_regcache_arch (regcache));
+	   regno++)
+	{
+	  store_register (regcache, regno);
+	}
+    }
+}
+
+/*  Given a pointer to a general register set in /proc format
+   (elf_gregset_t *), unpack the register contents and supply
+   them as gdb's idea of the current register values.  */
+
+void
+supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  const elf_greg_t *regp = (const elf_greg_t *) gregsetp;
+  int regi;
+
+  for (regi = M68K_D0_REGNUM;
+       regi <= gdbarch_sp_regnum (gdbarch);
+       regi++)
+    regcache_raw_supply (regcache, regi, &regp[regmap[regi]]);
+  regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch),
+		       &regp[PT_SR]);
+  regcache_raw_supply (regcache,
+		       gdbarch_pc_regnum (gdbarch), &regp[PT_PC]);
+}
+
+/* Fill register REGNO (if it is a general-purpose register) in
+   *GREGSETPS with the value in GDB's register array.  If REGNO is -1,
+   do this for all registers.  */
+void
+fill_gregset (const struct regcache *regcache,
+	      elf_gregset_t *gregsetp, int regno)
+{
+  elf_greg_t *regp = (elf_greg_t *) gregsetp;
+  int i;
+
+  for (i = 0; i < NUM_GREGS; i++)
+    if (regno == -1 || regno == i)
+      regcache_raw_collect (regcache, i, regp + regmap[i]);
+}
+
+#ifdef HAVE_PTRACE_GETREGS
+
+/* Fetch all general-purpose registers from process/thread TID and
+   store their values in GDB's register array.  */
+
+static void
+fetch_regs (struct regcache *regcache, int tid)
+{
+  elf_gregset_t regs;
+
+  if (ptrace (PTRACE_GETREGS, tid, 0, (int) &regs) < 0)
+    {
+      if (errno == EIO)
+	{
+	  /* The kernel we're running on doesn't support the GETREGS
+             request.  Reset `have_ptrace_getregs'.  */
+	  have_ptrace_getregs = 0;
+	  return;
+	}
+
+      perror_with_name (_("Couldn't get registers"));
+    }
+
+  supply_gregset (regcache, (const elf_gregset_t *) &regs);
+}
+
+/* Store all valid general-purpose registers in GDB's register array
+   into the process/thread specified by TID.  */
+
+static void
+store_regs (const struct regcache *regcache, int tid, int regno)
+{
+  elf_gregset_t regs;
+
+  if (ptrace (PTRACE_GETREGS, tid, 0, (int) &regs) < 0)
+    perror_with_name (_("Couldn't get registers"));
+
+  fill_gregset (regcache, &regs, regno);
+
+  if (ptrace (PTRACE_SETREGS, tid, 0, (int) &regs) < 0)
+    perror_with_name (_("Couldn't write registers"));
+}
+
+#else
+
+static void fetch_regs (struct regcache *regcache, int tid)
+{
+}
+
+static void store_regs (const struct regcache *regcache, int tid, int regno)
+{
+}
+
+#endif
+
+
+/* Transfering floating-point registers between GDB, inferiors and cores.  */
+
+/* What is the address of fpN within the floating-point register set F?  */
+#define FPREG_ADDR(f, n) (&(f)->fpregs[(n) * 3])
+
+/* Fill GDB's register array with the floating-point register values in
+   *FPREGSETP.  */
+
+void
+supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  int regi;
+
+  for (regi = gdbarch_fp0_regnum (gdbarch);
+       regi < gdbarch_fp0_regnum (gdbarch) + 8; regi++)
+    regcache_raw_supply (regcache, regi,
+			 FPREG_ADDR (fpregsetp,
+				     regi - gdbarch_fp0_regnum (gdbarch)));
+  regcache_raw_supply (regcache, M68K_FPC_REGNUM, &fpregsetp->fpcntl[0]);
+  regcache_raw_supply (regcache, M68K_FPS_REGNUM, &fpregsetp->fpcntl[1]);
+  regcache_raw_supply (regcache, M68K_FPI_REGNUM, &fpregsetp->fpcntl[2]);
+}
+
+/* Fill register REGNO (if it is a floating-point register) in
+   *FPREGSETP with the value in GDB's register array.  If REGNO is -1,
+   do this for all registers.  */
+
+void
+fill_fpregset (const struct regcache *regcache,
+	       elf_fpregset_t *fpregsetp, int regno)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  int i;
+
+  /* Fill in the floating-point registers.  */
+  for (i = gdbarch_fp0_regnum (gdbarch);
+       i < gdbarch_fp0_regnum (gdbarch) + 8; i++)
+    if (regno == -1 || regno == i)
+      regcache_raw_collect (regcache, i,
+			    FPREG_ADDR (fpregsetp,
+				        i - gdbarch_fp0_regnum (gdbarch)));
+
+  /* Fill in the floating-point control registers.  */
+  for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++)
+    if (regno == -1 || regno == i)
+      regcache_raw_collect (regcache, i,
+			    &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]);
+}
+
+#ifdef HAVE_PTRACE_GETREGS
+
+/* Fetch all floating-point registers from process/thread TID and store
+   thier values in GDB's register array.  */
+
+static void
+fetch_fpregs (struct regcache *regcache, int tid)
+{
+  elf_fpregset_t fpregs;
+
+  if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
+    perror_with_name (_("Couldn't get floating point status"));
+
+  supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs);
+}
+
+/* Store all valid floating-point registers in GDB's register array
+   into the process/thread specified by TID.  */
+
+static void
+store_fpregs (const struct regcache *regcache, int tid, int regno)
+{
+  elf_fpregset_t fpregs;
+
+  if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
+    perror_with_name (_("Couldn't get floating point status"));
+
+  fill_fpregset (regcache, &fpregs, regno);
+
+  if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0)
+    perror_with_name (_("Couldn't write floating point status"));
+}
+
+#else
+
+static void fetch_fpregs (struct regcache *regcache, int tid)
+{
+}
+
+static void store_fpregs (const struct regcache *regcache, int tid, int regno)
+{
+}
+
+#endif
+
+/* Transferring arbitrary registers between GDB and inferior.  */
+
+/* Fetch register REGNO from the child process.  If REGNO is -1, do
+   this for all registers (including the floating point and SSE
+   registers).  */
+
+static void
+m68k_linux_fetch_inferior_registers (struct target_ops *ops,
+				     struct regcache *regcache, int regno)
+{
+  int tid;
+
+  /* Use the old method of peeking around in `struct user' if the
+     GETREGS request isn't available.  */
+  if (! have_ptrace_getregs)
+    {
+      old_fetch_inferior_registers (regcache, regno);
+      return;
+    }
+
+  /* GNU/Linux LWP ID's are process ID's.  */
+  tid = ptid_get_lwp (inferior_ptid);
+  if (tid == 0)
+    tid = ptid_get_pid (inferior_ptid);	/* Not a threaded program.  */
+
+  /* Use the PTRACE_GETFPXREGS request whenever possible, since it
+     transfers more registers in one system call, and we'll cache the
+     results.  But remember that fetch_fpxregs can fail, and return
+     zero.  */
+  if (regno == -1)
+    {
+      fetch_regs (regcache, tid);
+
+      /* The call above might reset `have_ptrace_getregs'.  */
+      if (! have_ptrace_getregs)
+	{
+	  old_fetch_inferior_registers (regcache, -1);
+	  return;
+	}
+
+      fetch_fpregs (regcache, tid);
+      return;
+    }
+
+  if (getregs_supplies (regno))
+    {
+      fetch_regs (regcache, tid);
+      return;
+    }
+
+  if (getfpregs_supplies (regno))
+    {
+      fetch_fpregs (regcache, tid);
+      return;
+    }
+
+  internal_error (__FILE__, __LINE__,
+		  _("Got request for bad register number %d."), regno);
+}
+
+/* Store register REGNO back into the child process.  If REGNO is -1,
+   do this for all registers (including the floating point and SSE
+   registers).  */
+static void
+m68k_linux_store_inferior_registers (struct target_ops *ops,
+				     struct regcache *regcache, int regno)
+{
+  int tid;
+
+  /* Use the old method of poking around in `struct user' if the
+     SETREGS request isn't available.  */
+  if (! have_ptrace_getregs)
+    {
+      old_store_inferior_registers (regcache, regno);
+      return;
+    }
+
+  /* GNU/Linux LWP ID's are process ID's.  */
+  tid = ptid_get_lwp (inferior_ptid);
+  if (tid == 0)
+    tid = ptid_get_pid (inferior_ptid);	/* Not a threaded program.  */
+
+  /* Use the PTRACE_SETFPREGS requests whenever possible, since it
+     transfers more registers in one system call.  But remember that
+     store_fpregs can fail, and return zero.  */
+  if (regno == -1)
+    {
+      store_regs (regcache, tid, regno);
+      store_fpregs (regcache, tid, regno);
+      return;
+    }
+
+  if (getregs_supplies (regno))
+    {
+      store_regs (regcache, tid, regno);
+      return;
+    }
+
+  if (getfpregs_supplies (regno))
+    {
+      store_fpregs (regcache, tid, regno);
+      return;
+    }
+
+  internal_error (__FILE__, __LINE__,
+		  _("Got request to store bad register number %d."), regno);
+}
+
+
+/* Fetch the thread-local storage pointer for libthread_db.  */
+
+ps_err_e
+ps_get_thread_area (struct ps_prochandle *ph, 
+		    lwpid_t lwpid, int idx, void **base)
+{
+  if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) < 0)
+    return PS_ERR;
+
+  /* IDX is the bias from the thread pointer to the beginning of the
+     thread descriptor.  It has to be subtracted due to implementation
+     quirks in libthread_db.  */
+  *base = (char *) *base - idx;
+
+  return PS_OK;
+}
+
+
+void _initialize_m68k_linux_nat (void);
+
+void
+_initialize_m68k_linux_nat (void)
+{
+  struct target_ops *t;
+
+  /* Fill in the generic GNU/Linux methods.  */
+  t = linux_target ();
+
+  /* Add our register access methods.  */
+  t->to_fetch_registers = m68k_linux_fetch_inferior_registers;
+  t->to_store_registers = m68k_linux_store_inferior_registers;
+
+  /* Register the target.  */
+  linux_nat_add_target (t);
+}