1  /* Function to access r_debug structure.  MIPS specific version.
       2     Copyright (C) 2022-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifdef EW_
      20  /* Return the offset of the struct r_debug before relocation.  */
      21  
      22  static inline EW(Addr)
      23  E(r_debug_offset) (EW(Dyn) *d, int fd, EW(Addr) offset)
      24  {
      25    switch (d->d_tag)
      26      {
      27      case DT_MIPS_RLD_MAP_REL:
      28        offset += d->d_un.d_val;
      29        break;
      30      case DT_MIPS_RLD_MAP:
      31        offset = d->d_un.d_ptr;
      32        break;
      33      default:
      34        return 0;
      35      }
      36  
      37    if (pread (fd, &offset, sizeof (offset), offset) != sizeof (offset))
      38      return 0;
      39  
      40    return offset;
      41  }
      42  #else
      43  /* Return the address of the struct r_debug after relocation.  */
      44  
      45  static inline EW(Addr)
      46  E(r_debug_address) (EW(Dyn) *d)
      47  {
      48    EW(Addr) ptr;
      49  
      50    switch (d->d_tag)
      51      {
      52      case DT_MIPS_RLD_MAP_REL:
      53        ptr = ((EW(Addr)) d) + d->d_un.d_val;
      54        break;
      55      case DT_MIPS_RLD_MAP:
      56        ptr = d->d_un.d_ptr;
      57        break;
      58      default:
      59        return 0;
      60      }
      61  
      62    return *(EW(Addr) *) ptr;
      63  }
      64  #endif