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       1                 :            : /* RISC-V ABI-specified defaults for DWARF CFI.
       2                 :            :    This file is part of elfutils.
       3                 :            : 
       4                 :            :    This file is free software; you can redistribute it and/or modify
       5                 :            :    it under the terms of either
       6                 :            : 
       7                 :            :      * the GNU Lesser General Public License as published by the Free
       8                 :            :        Software Foundation; either version 3 of the License, or (at
       9                 :            :        your option) any later version
      10                 :            : 
      11                 :            :    or
      12                 :            : 
      13                 :            :      * the GNU General Public License as published by the Free
      14                 :            :        Software Foundation; either version 2 of the License, or (at
      15                 :            :        your option) any later version
      16                 :            : 
      17                 :            :    or both in parallel, as here.
      18                 :            : 
      19                 :            :    elfutils is distributed in the hope that it will be useful, but
      20                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      21                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      22                 :            :    General Public License for more details.
      23                 :            : 
      24                 :            :    You should have received copies of the GNU General Public License and
      25                 :            :    the GNU Lesser General Public License along with this program.  If
      26                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      27                 :            : 
      28                 :            : #ifdef HAVE_CONFIG_H
      29                 :            : # include <config.h>
      30                 :            : #endif
      31                 :            : 
      32                 :            : #include <dwarf.h>
      33                 :            : 
      34                 :            : #define BACKEND riscv64_
      35                 :            : #include "libebl_CPU.h"
      36                 :            : 
      37                 :            : 
      38                 :            : int
      39                 :          0 : riscv_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
      40                 :            : {
      41                 :          0 :   static const uint8_t abi_cfi[] =
      42                 :            :     {
      43                 :            :       /* The initial Canonical Frame Address is the value of the
      44                 :            :          Stack Pointer (r2) as setup in the previous frame. */
      45                 :            :       DW_CFA_def_cfa, ULEB128_7 (2), ULEB128_7 (0),
      46                 :            : 
      47                 :            :       /* The Stack Pointer (r2) is restored from CFA address by default.  */
      48                 :            :       DW_CFA_val_offset, ULEB128_7 (2), ULEB128_7 (0),
      49                 :            : 
      50                 :            : #define SV(n) DW_CFA_same_value, ULEB128_7 (n)
      51                 :            :       /* The return address register contains the return address setup by
      52                 :            :          caller.  */
      53                 :            :       SV (1),
      54                 :            : 
      55                 :            :       /* Callee-saved registers s0-s11, fs0-fs11.  */
      56                 :            :       SV(8), SV (9), SV (18), SV (19), SV (20), SV (21),
      57                 :            :       SV (22), SV (23), SV (24), SV (25), SV (26), SV (27),
      58                 :            : 
      59                 :            :       SV (40), SV (41),  SV (50),  SV (51), SV (52),  SV (53),
      60                 :            :       SV (54), SV (55),  SV (56),  SV (57), SV (58),  SV (59),
      61                 :            : #undef SV
      62                 :            : 
      63                 :            :       /* XXX Note: registers intentionally unused by the program,
      64                 :            :          for example as a consequence of the procedure call standard
      65                 :            :          should be initialized as if by DW_CFA_same_value.  */
      66                 :            :     };
      67                 :            : 
      68                 :          0 :   abi_info->initial_instructions = abi_cfi;
      69                 :          0 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      70                 :          0 :   abi_info->data_alignment_factor = -4;
      71                 :            : 
      72                 :          0 :   abi_info->return_address_register = 1; /* ra.  */
      73                 :            : 
      74                 :          0 :   return 0;
      75                 :            : }