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       1                 :            : /* ppc ABI-specified defaults for DWARF CFI.
       2                 :            :    Copyright (C) 2012, 2013 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            : 
       5                 :            :    This file is free software; you can redistribute it and/or modify
       6                 :            :    it under the terms of either
       7                 :            : 
       8                 :            :      * the GNU Lesser General Public License as published by the Free
       9                 :            :        Software Foundation; either version 3 of the License, or (at
      10                 :            :        your option) any later version
      11                 :            : 
      12                 :            :    or
      13                 :            : 
      14                 :            :      * the GNU General Public License as published by the Free
      15                 :            :        Software Foundation; either version 2 of the License, or (at
      16                 :            :        your option) any later version
      17                 :            : 
      18                 :            :    or both in parallel, as here.
      19                 :            : 
      20                 :            :    elfutils is distributed in the hope that it will be useful, but
      21                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23                 :            :    General Public License for more details.
      24                 :            : 
      25                 :            :    You should have received copies of the GNU General Public License and
      26                 :            :    the GNU Lesser General Public License along with this program.  If
      27                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      28                 :            : 
      29                 :            : #ifdef HAVE_CONFIG_H
      30                 :            : # include <config.h>
      31                 :            : #endif
      32                 :            : 
      33                 :            : #include <dwarf.h>
      34                 :            : 
      35                 :            : #define BACKEND ppc_
      36                 :            : #include "libebl_CPU.h"
      37                 :            : 
      38                 :            : int
      39                 :         16 : ppc_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
      40                 :            : {
      41                 :            :   static const uint8_t abi_cfi[] =
      42                 :            :     {
      43                 :            :       /* This instruction is provided in every CIE.  It is not repeated here:
      44                 :            :          DW_CFA_def_cfa, ULEB128_7 (1), ULEB128_7 (0)  */
      45                 :            :       /* r1 is assumed to be restored from cfa address,
      46                 :            :          r1 acts as a stack frame pointer.  */
      47                 :            :       DW_CFA_val_offset, ULEB128_7 (1), ULEB128_7 (0),
      48                 :            :       /* lr is not callee-saved but it needs to be preserved as it is pre-set
      49                 :            :          by the caller.  */
      50                 :            :       DW_CFA_same_value, ULEB128_7 (65), /* lr */
      51                 :            : 
      52                 :            :       /* Callee-saved regs.  */
      53                 :            : #define SV(n) DW_CFA_same_value, ULEB128_7 (n)
      54                 :            :       SV (2),                   /* r2 is TOC pointer.  */
      55                 :            :       SV (13),                  /* Reserved as system thread id (is it for CFI?).  */
      56                 :            :       /* r14-r31 are non-volatile registers.  */
      57                 :            :       SV (14), SV (15), SV (16), SV (17), SV (18), SV (19), SV (20), SV (21),
      58                 :            :       SV (22), SV (23), SV (24), SV (25), SV (26), SV (27), SV (28), SV (29),
      59                 :            :       SV (30), SV (31)
      60                 :            :       /* VMX registers v20-v31 and vrsave are non-volatile but they are
      61                 :            :          assigned DWARF registers 1144-1156 (v20-v31) which is outside of the
      62                 :            :          CFI supported range.  */
      63                 :            : #undef SV
      64                 :            :     };
      65                 :            : 
      66                 :         16 :   abi_info->initial_instructions = abi_cfi;
      67                 :         16 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      68         [ +  + ]:         16 :   abi_info->data_alignment_factor = ebl->class == ELFCLASS64 ? 8 : 4;
      69                 :            : 
      70                 :         16 :   abi_info->return_address_register = 65;
      71                 :            : 
      72                 :         16 :   return 0;
      73                 :            : }
      74                 :            : 
      75                 :            : __typeof (ppc_abi_cfi)
      76                 :            :      ppc64_abi_cfi
      77                 :            :      __attribute__ ((alias ("ppc_abi_cfi")));