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       1                 :             : /* s390 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 s390_
      36                 :             : #include "libebl_CPU.h"
      37                 :             : 
      38                 :             : int
      39                 :           8 : s390_abi_cfi (Ebl *ebl, Dwarf_CIE *abi_info)
      40                 :             : {
      41                 :           8 :   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 (15), ULEB128_7 (96)  */
      45                 :             :       /* r14 is not callee-saved but it needs to be preserved as it is pre-set
      46                 :             :          by the caller.  */
      47                 :             :       DW_CFA_same_value, ULEB128_7 (14), /* r14 */
      48                 :             : 
      49                 :             :       /* Callee-saved regs.  */
      50                 :             : #define SV(n) DW_CFA_same_value, ULEB128_7 (n)
      51                 :             :       SV (6), SV (7), SV (8), SV (9), SV (10),                 /* r6-r13, r15 */
      52                 :             :       SV (11), SV (12), SV (13), SV (15),
      53                 :             :       SV (16 + 8), SV (16 + 9), SV (16 + 10), SV (16 + 11),    /* f8-f15 */
      54                 :             :       SV (16 + 12), SV (16 + 13), SV (16 + 14), SV (16 + 15)
      55                 :             : #undef SV
      56                 :             :     };
      57                 :             : 
      58                 :           8 :   abi_info->initial_instructions = abi_cfi;
      59                 :           8 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      60         [ +  + ]:           8 :   abi_info->data_alignment_factor = ebl->class == ELFCLASS64 ? 8 : 4;
      61                 :             : 
      62                 :           8 :   abi_info->return_address_register = 14;
      63                 :             : 
      64                 :           8 :   return 0;
      65                 :             : }