sysdeps/ia64/dl-fptr.h

   1 /* Function descriptors.  IA64 version.
   2    Copyright (C) 2003-2023 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 #ifndef dl_ia64_fptr_h
  20 #define dl_ia64_fptr_h 1
  21
  22 #include <ia64intrin.h>
  23 #include <sysdeps/generic/dl-fptr.h>
  24
  25 #define COMPARE_AND_SWAP(ptr, old, new) \
  26   __sync_bool_compare_and_swap (ptr, old, new)
  27
  28 /* There are currently 123 dynamic symbols in ld.so.
  29    ELF_MACHINE_BOOT_FPTR_TABLE_LEN needs to be at least that big.  */
  30 #define ELF_MACHINE_BOOT_FPTR_TABLE_LEN 200
  31
  32 #define ELF_MACHINE_LOAD_ADDRESS(var, symbol)   \
  33   asm ("movl %0 = @gprel (" #symbol ");; add %0 = %0, gp" : "=&r" (var));
  34
  35 /* We don't have a gcc helper to extract the plabel info.  */
  36 #define ELF_PTR_TO_FDESC(ptr) \
  37   ({ union { \
  38        void *_ptr; \
  39        struct fdesc *_fdesc; \
  40      } _u; \
  41      _u._ptr = ptr; \
  42      _u._fdesc; \
  43   })
  44
  45 #endif /* !dl_ia64_fptr_h */