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/* Target-dependent code for ARM BSD's.

   Copyright (C) 2006, 2007, 2008, 2009, 2010 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 "osabi.h"

#include "regcache.h"

#include "regset.h"

#include "gdb_assert.h"

#include "gdb_string.h"

#include "arm-tdep.h"

/* Core file support.  */

/* Sizeof `struct reg' in <machine/reg.h>.  */

#define ARMBSD_SIZEOF_GREGS     (17 * 4)

/* Sizeof `struct fpreg' in <machine/reg.h.  */

#define ARMBSD_SIZEOF_FPREGS    ((1 + (8 * 3)) * 4)

static int

armbsd_fpreg_offset (int regnum)

{

  if (regnum == ARM_FPS_REGNUM)

    return 0;

  return 4 + (regnum - ARM_F0_REGNUM) * 12;

}

/* Supply register REGNUM from the buffer specified by FPREGS and LEN

   in the floating-point register set REGSET to register cache

   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

static void

armbsd_supply_fpregset (const struct regset *regset,

                        struct regcache *regcache,

                        int regnum, const void *fpregs, size_t len)

{

  const gdb_byte *regs = fpregs;

  int i;

  gdb_assert (len >= ARMBSD_SIZEOF_FPREGS);

  for (i = ARM_F0_REGNUM; i <= ARM_FPS_REGNUM; i++)

    {

      if (regnum == i || regnum == -1)

        regcache_raw_supply (regcache, i, regs + armbsd_fpreg_offset (i));

    }

}

/* 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

armbsd_supply_gregset (const struct regset *regset,

                       struct regcache *regcache,

                       int regnum, const void *gregs, size_t len)

{

  const gdb_byte *regs = gregs;

  int i;

  gdb_assert (len >= ARMBSD_SIZEOF_GREGS);

  for (i = ARM_A1_REGNUM; i <= ARM_PC_REGNUM; i++)

    {

      if (regnum == i || regnum == -1)

        regcache_raw_supply (regcache, i, regs + i * 4);

    }

  if (regnum == ARM_PS_REGNUM || regnum == -1)

    regcache_raw_supply (regcache, i, regs + 16 * 4);

  if (len >= ARMBSD_SIZEOF_GREGS + ARMBSD_SIZEOF_FPREGS)

    {

      regs += ARMBSD_SIZEOF_GREGS;

      len -= ARMBSD_SIZEOF_GREGS;

      armbsd_supply_fpregset (regset, regcache, regnum, regs, len);

    }

}

/* ARM register sets.  */

static struct regset armbsd_gregset =

{

  NULL,

  armbsd_supply_gregset

};

static struct regset armbsd_fpregset =

{

  NULL,

  armbsd_supply_fpregset

};

/* Return the appropriate register set for the core section identified

   by SECT_NAME and SECT_SIZE.  */

const struct regset *

armbsd_regset_from_core_section (struct gdbarch *gdbarch,

                                 const char *sect_name, size_t sect_size)

{

  if (strcmp (sect_name, ".reg") == 0 && sect_size >= ARMBSD_SIZEOF_GREGS)

    return &armbsd_gregset;

  if (strcmp (sect_name, ".reg2") == 0 && sect_size >= ARMBSD_SIZEOF_FPREGS)

    return &armbsd_fpregset;

  return NULL;

}