Line data    Source code

       1              : /* Alpha ABI-specified defaults for DWARF CFI.
       2              :    Copyright (C) 2026 Matt Turner
       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              : 
      30              : #ifdef HAVE_CONFIG_H
      31              : # include <config.h>
      32              : #endif
      33              : 
      34              : #include <dwarf.h>
      35              : 
      36              : #define BACKEND alpha_
      37              : #include "libebl_CPU.h"
      38              : 
      39              : int
      40            0 : alpha_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
      41              : {
      42            0 :   static const uint8_t abi_cfi[] =
      43              :     {
      44              :       /* The CFA is the value of $sp ($30) in the previous frame.  */
      45              :       DW_CFA_def_cfa, ULEB128_7 (30), ULEB128_7 (0),
      46              : 
      47              :       /* $sp is restored from the CFA.  */
      48              :       DW_CFA_val_offset, ULEB128_7 (30), ULEB128_7 (0),
      49              : 
      50              : #define SV(n) DW_CFA_same_value, ULEB128_7 (n)
      51              :       /* The return address in $ra ($26) is set up by the caller.  */
      52              :       SV (26),
      53              : 
      54              :       /* Callee-saved registers $s0-$s5 ($9-$14) and $fp ($15).  */
      55              :       SV (9), SV (10), SV (11), SV (12), SV (13), SV (14), SV (15),
      56              : 
      57              :       /* Callee-saved registers $f2-$f9.  */
      58              :       SV (34), SV (35), SV (36), SV (37), SV (38), SV (39), SV (40), SV (41),
      59              : #undef SV
      60              :     };
      61              : 
      62            0 :   abi_info->initial_instructions = abi_cfi;
      63            0 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      64            0 :   abi_info->data_alignment_factor = -8;
      65              : 
      66            0 :   abi_info->return_address_register = 26; /* $ra */
      67              : 
      68            0 :   return 0;
      69              : }