Line data    Source code

       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           4 : s390_abi_cfi (Ebl *ebl, Dwarf_CIE *abi_info)
      40             : {
      41           4 :   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           4 :   abi_info->initial_instructions = abi_cfi;
      59           4 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      60           4 :   abi_info->data_alignment_factor = ebl->class == ELFCLASS64 ? 8 : 4;
      61             : 
      62           4 :   abi_info->return_address_register = 14;
      63             : 
      64           4 :   return 0;
      65             : }