sysdeps/ia64/dl-lookupcfg.h

   1 /* Configuration of lookup functions.
   2    Copyright (C) 2000-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #define ELF_FUNCTION_PTR_IS_SPECIAL
  20 #define DL_UNMAP_IS_SPECIAL
  21
  22 #include <dl-fptr.h>
  23
  24 /* We do not support copy relocations for IA-64.  */
  25 #define DL_NO_COPY_RELOCS
  26
  27 /* Forward declaration.  */
  28 struct link_map;
  29
  30 extern void *_dl_symbol_address (struct link_map *map, const Elf64_Sym *ref);
  31
  32 #define DL_SYMBOL_ADDRESS(map, ref) _dl_symbol_address(map, ref)
  33
  34 extern Elf64_Addr _dl_lookup_address (const void *address);
  35
  36 #define DL_LOOKUP_ADDRESS(addr) _dl_lookup_address (addr)
  37
  38 extern void _dl_unmap (struct link_map *map);
  39
  40 #define DL_UNMAP(map) _dl_unmap (map)
  41
  42 #define DL_DT_FUNCTION_ADDRESS(map, start, attr, addr)                  \
  43   attr volatile unsigned long int fptr[2];                                      \
  44   fptr[0] = (unsigned long int) (start);                                        \
  45   fptr[1] = (map)->l_info[DT_PLTGOT]->d_un.d_ptr;                       \
  46   addr = (ElfW(Addr)) fptr;                                             \
  47
  48 #define DL_CALL_DT_INIT(map, start, argc, argv, env)    \
  49 {                                                       \
  50   ElfW(Addr) addr;                                      \
  51   DL_DT_FUNCTION_ADDRESS(map, start, , addr)            \
  52   init_t init = (init_t) addr;                          \
  53   init (argc, argv, env);                               \
  54 }
  55
  56 #define DL_CALL_DT_FINI(map, start)             \
  57 {                                               \
  58   ElfW(Addr) addr;                              \
  59   DL_DT_FUNCTION_ADDRESS(map, start, , addr)    \
  60   fini_t fini = (fini_t) addr;                  \
  61   fini ();                                      \
  62 }
  63
  64 /* The type of the return value of fixup/profile_fixup.  */
  65 #define DL_FIXUP_VALUE_TYPE struct fdesc
  66 /* Construct a value of type DL_FIXUP_VALUE_TYPE from a code address
  67    and a link map.  */
  68 #define DL_FIXUP_MAKE_VALUE(map, addr) \
  69   ((struct fdesc) { (addr), (map)->l_info[DT_PLTGOT]->d_un.d_ptr })
  70 /* Extract the code address from a value of type DL_FIXUP_MAKE_VALUE.
  71  */
  72 #define DL_FIXUP_VALUE_CODE_ADDR(value) (value).ip
  73
  74 #define DL_FIXUP_VALUE_ADDR(value) ((uintptr_t) &(value))
  75 #define DL_FIXUP_ADDR_VALUE(addr) (*(struct fdesc *) (addr))