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/* Low level Alpha GNU/Linux interface, for GDB when running native.

   Copyright (C) 2005, 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 "target.h"

#include "regcache.h"

#include "linux-nat.h"

#include "alpha-tdep.h"

#include <sys/ptrace.h>

#include <alpha/ptrace.h>

#include <sys/procfs.h>

#include "gregset.h"

/* The address of UNIQUE for ptrace.  */

#define ALPHA_UNIQUE_PTRACE_ADDR 65

/*

 * See the comment in m68k-tdep.c regarding the utility of these functions.

 */

void

supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)

{

  const long *regp = (const long *)gregsetp;

  /* PC is in slot 32, UNIQUE is in slot 33.  */

  alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32);

}

void

fill_gregset (const struct regcache *regcache,

              gdb_gregset_t *gregsetp, int regno)

{

  long *regp = (long *)gregsetp;

  /* PC is in slot 32, UNIQUE is in slot 33.  */

  alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32);

}

/*

 * Now we do the same thing for floating-point registers.

 * Again, see the comments in m68k-tdep.c.

 */

void

supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)

{

  const long *regp = (const long *)fpregsetp;

  /* FPCR is in slot 32.  */

  alpha_supply_fp_regs (regcache, -1, regp, regp + 31);

}

void

fill_fpregset (const struct regcache *regcache,

               gdb_fpregset_t *fpregsetp, int regno)

{

  long *regp = (long *)fpregsetp;

  /* FPCR is in slot 32.  */

  alpha_fill_fp_regs (regcache, regno, regp, regp + 31);

}

static CORE_ADDR

alpha_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p)

{

  if (regno == gdbarch_pc_regnum (gdbarch))

    return PC;

  if (regno == ALPHA_UNIQUE_REGNUM)

    return ALPHA_UNIQUE_PTRACE_ADDR;

  if (regno < gdbarch_fp0_regnum (gdbarch))

    return GPR_BASE + regno;

  else

    return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch);

}

void _initialialize_alpha_linux_nat (void);

void

_initialize_alpha_linux_nat (void)

{

  linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset));

}