sysdeps/ia64/dl-lookupcfg.h

   1 /* Configuration of lookup functions.
   2    Copyright (C) 2000-2017 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 rtld_hidden_proto (_dl_symbol_address)
  32
  33 #define DL_SYMBOL_ADDRESS(map, ref) _dl_symbol_address(map, ref)
  34
  35 extern Elf64_Addr _dl_lookup_address (const void *address);
  36
  37 #define DL_LOOKUP_ADDRESS(addr) _dl_lookup_address (addr)
  38
  39 extern void attribute_hidden _dl_unmap (struct link_map *map);
  40
  41 #define DL_UNMAP(map) _dl_unmap (map)
  42
  43 #define DL_DT_FUNCTION_ADDRESS(map, start, attr, addr)                  \
  44   attr volatile unsigned long int fptr[2];                                      \
  45   fptr[0] = (unsigned long int) (start);                                        \
  46   fptr[1] = (map)->l_info[DT_PLTGOT]->d_un.d_ptr;                       \
  47   addr = (ElfW(Addr)) fptr;                                             \
  48
  49 #define DL_CALL_DT_INIT(map, start, argc, argv, env)    \
  50 {                                                       \
  51   ElfW(Addr) addr;                                      \
  52   DL_DT_FUNCTION_ADDRESS(map, start, , addr)            \
  53   init_t init = (init_t) addr;                          \
  54   init (argc, argv, env);                               \
  55 }
  56
  57 #define DL_CALL_DT_FINI(map, start)             \
  58 {                                               \
  59   ElfW(Addr) addr;                              \
  60   DL_DT_FUNCTION_ADDRESS(map, start, , addr)    \
  61   fini_t fini = (fini_t) addr;                  \
  62   fini ();                                      \
  63 }
  64
  65 /* The type of the return value of fixup/profile_fixup.  */
  66 #define DL_FIXUP_VALUE_TYPE struct fdesc
  67 /* Construct a value of type DL_FIXUP_VALUE_TYPE from a code address
  68    and a link map.  */
  69 #define DL_FIXUP_MAKE_VALUE(map, addr) \
  70   ((struct fdesc) { (addr), (map)->l_info[DT_PLTGOT]->d_un.d_ptr })
  71 /* Extract the code address from a value of type DL_FIXUP_MAKE_VALUE.
  72  */
  73 #define DL_FIXUP_VALUE_CODE_ADDR(value) (value).ip
  74
  75 #define DL_FIXUP_VALUE_ADDR(value) ((uintptr_t) &(value))
  76 #define DL_FIXUP_ADDR_VALUE(addr) (*(struct fdesc *) (addr))