sysdeps/aarch64/bits/link.h

   1 /* Copyright (C) 2005-2022 Free Software Foundation, Inc.
   2
   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 License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    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 _LINK_H
  20 # error "Never include <bits/link.h> directly; use <link.h> instead."
  21 #endif
  22
  23 typedef union
  24 {
  25   float s;
  26   double d;
  27   long double q;
  28 } La_aarch64_vector;
  29
  30 /* Registers for entry into PLT on AArch64.  */
  31 typedef struct La_aarch64_regs
  32 {
  33   uint64_t          lr_xreg[9];
  34   La_aarch64_vector lr_vreg[8];
  35   uint64_t          lr_sp;
  36   uint64_t          lr_lr;
  37   void              *lr_vpcs;
  38 } La_aarch64_regs;
  39
  40 /* Return values for calls from PLT on AArch64.  */
  41 typedef struct La_aarch64_retval
  42 {
  43   /* Up to eight integer registers can be used for a return value.  */
  44   uint64_t          lrv_xreg[8];
  45   /* Up to eight V registers can be used for a return value.  */
  46   La_aarch64_vector lrv_vreg[8];
  47   void              *lrv_vpcs;
  48 } La_aarch64_retval;
  49 __BEGIN_DECLS
  50
  51 extern ElfW(Addr)
  52 la_aarch64_gnu_pltenter (ElfW(Sym) *__sym, unsigned int __ndx,
  53                          uintptr_t *__refcook,
  54                          uintptr_t *__defcook,
  55                          La_aarch64_regs *__regs,
  56                          unsigned int *__flags,
  57                          const char *__symname,
  58                          long int *__framesizep);
  59
  60 extern unsigned int
  61 la_aarch64_gnu_pltexit (ElfW(Sym) *__sym, unsigned int __ndx,
  62                         uintptr_t *__refcook,
  63                         uintptr_t *__defcook,
  64                         const La_aarch64_regs *__inregs,
  65                         La_aarch64_retval *__outregs,
  66                         const char *__symname);
  67
  68 __END_DECLS