/* ppc ABI-specified defaults for DWARF CFI.

   Copyright (C) 2012, 2013 Red Hat, Inc.

   This file is part of elfutils.

   This file is free software; you can redistribute it and/or modify

   it under the terms of either

     * the GNU Lesser General Public License as published by the Free

       Software Foundation; either version 3 of the License, or (at

       your option) any later version

   or

     * the GNU General Public License as published by the Free

       Software Foundation; either version 2 of the License, or (at

       your option) any later version

   or both in parallel, as here.

   elfutils 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 copies of the GNU General Public License and

   the GNU Lesser General Public License along with this program.  If

   not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <dwarf.h>

#define BACKEND ppc_

#include "libebl_CPU.h"

int

ppc_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)

{

  static const uint8_t abi_cfi[] =

    {

      /* This instruction is provided in every CIE.  It is not repeated here:

	 DW_CFA_def_cfa, ULEB128_7 (1), ULEB128_7 (0)  */

      /* r1 is assumed to be restored from cfa adress,

	 r1 acts as a stack frame pointer.  */

      DW_CFA_val_offset, ULEB128_7 (1), ULEB128_7 (0),

      /* lr is not callee-saved but it needs to be preserved as it is pre-set

	 by the caller.  */

      DW_CFA_same_value, ULEB128_7 (65), /* lr */

      /* Callee-saved regs.  */

#define SV(n) DW_CFA_same_value, ULEB128_7 (n)

      SV (2),			/* r2 is TOC pointer.  */

      SV (13),			/* Reserved as system thread id (is it for CFI?).  */

      /* r14-r31 are non-volatile registers.  */

      SV (14), SV (15), SV (16), SV (17), SV (18), SV (19), SV (20), SV (21),

      SV (22), SV (23), SV (24), SV (25), SV (26), SV (27), SV (28), SV (29),

      SV (30), SV (31)

      /* VMX registers v20-v31 and vrsave are non-volatile but they are

	 assigned DWARF registers 1144-1156 (v20-v31) which is outside of the

	 CFI supported range.  */

#undef SV

    };

  abi_info->initial_instructions = abi_cfi;

  abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];

  abi_info->data_alignment_factor = ebl->class == ELFCLASS64 ? 8 : 4;

  abi_info->return_address_register = 65;

  return 0;

}

__typeof (ppc_abi_cfi)

     ppc64_abi_cfi

     __attribute__ ((alias ("ppc_abi_cfi")));