sysdeps/mips/dl-r_debug.h

   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