sysdeps/unix/sysv/linux/arm/tls.h

   1 /* Definition for thread-local data handling.  ARM/Linux version.
   2    Copyright (C) 2005-2023 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 _LINUX_ARM_TLS_H
  20 #define _LINUX_ARM_TLS_H        1
  21
  22 /* Almost everything is OS-independent and common for all NPTL on ARM.  */
  23 #include <sysdeps/arm/nptl/tls.h>
  24
  25 #ifndef __ASSEMBLER__
  26
  27 /* Get system call information.  */
  28 # include <sysdep.h>
  29
  30 /* Code to initially initialize the thread pointer.  This might need
  31    special attention since 'errno' is not yet available and if the
  32    operation can cause a failure 'errno' must not be touched.  */
  33 # define TLS_INIT_TP(tcbp) \
  34   ({ long int result_var;                                               \
  35      result_var = INTERNAL_SYSCALL_CALL (set_tls, (tcbp));              \
  36      !INTERNAL_SYSCALL_ERROR_P (result_var); })
  37
  38 #endif /* __ASSEMBLER__ */
  39
  40 #endif  /* tls.h */