Subversion Repositories openrisc_2011-10-31

/* Native-dependent code for MIPS systems running NetBSD.

   Copyright (C) 2000, 2001, 2002, 2004, 2007, 2008

   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 "mips-tdep.h"

#include "mipsnbsd-tdep.h"

#include "inf-ptrace.h"

/* Determine if PT_GETREGS fetches this register.  */

static int

getregs_supplies (int regno)

{

  return ((regno) >= MIPS_ZERO_REGNUM

          && (regno) <= gdbarch_pc_regnum (current_gdbarch));

}

static void

mipsnbsd_fetch_inferior_registers (struct regcache *regcache, int regno)

{

  if (regno == -1 || getregs_supplies (regno))

    {

      struct reg regs;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),

                  (PTRACE_TYPE_ARG3) &regs, 0) == -1)

        perror_with_name (_("Couldn't get registers"));

      mipsnbsd_supply_reg (regcache, (char *) &regs, regno);

      if (regno != -1)

        return;

    }

  if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))

    {

      struct fpreg fpregs;

      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),

                  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)

        perror_with_name (_("Couldn't get floating point status"));

      mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno);

    }

}

static void

mipsnbsd_store_inferior_registers (struct regcache *regcache, int regno)

{

  if (regno == -1 || getregs_supplies (regno))

    {

      struct reg regs;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),

                  (PTRACE_TYPE_ARG3) &regs, 0) == -1)

        perror_with_name (_("Couldn't get registers"));

      mipsnbsd_fill_reg (regcache, (char *) &regs, regno);

      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),

                  (PTRACE_TYPE_ARG3) &regs, 0) == -1)

        perror_with_name (_("Couldn't write registers"));

      if (regno != -1)

        return;

    }

  if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))

    {

      struct fpreg fpregs;

      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),

                  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)

        perror_with_name (_("Couldn't get floating point status"));

      mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);

      if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),

                  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)

        perror_with_name (_("Couldn't write floating point status"));

    }

}

/* Provide a prototype to silence -Wmissing-prototypes.  */

void _initialize_mipsnbsd_nat (void);

void

_initialize_mipsnbsd_nat (void)

{

  struct target_ops *t;

  t = inf_ptrace_target ();

  t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;

  t->to_store_registers = mipsnbsd_store_inferior_registers;

  add_target (t);

}