Line data    Source code

       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              : }