include/urcu/arch/aarch64.h

   1 // SPDX-FileCopyrightText: 2010 Paul E. McKenney, IBM Corporation.
   2 // SPDX-FileCopyrightText: 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3 //
   4 // SPDX-License-Identifier: LGPL-2.1-or-later
   5
   6 #ifndef _URCU_ARCH_AARCH64_H
   7 #define _URCU_ARCH_AARCH64_H
   8
   9 /*
  10  * arch/aarch64.h: definitions for aarch64 architecture
  11  */
  12
  13 #include <urcu/compiler.h>
  14 #include <urcu/config.h>
  15 #include <urcu/syscall-compat.h>
  16
  17 #ifdef __cplusplus
  18 extern "C" {
  19 #endif
  20
  21 #include <stdlib.h>
  22 #include <sys/time.h>
  23
  24 /*
  25  * On Linux, define the membarrier system call number if not yet available in
  26  * the system headers. aarch64 implements asm-generic/unistd.h system call
  27  * numbers.
  28  */
  29 #if (defined(__linux__) && !defined(__NR_membarrier))
  30 #define __NR_membarrier         283
  31 #endif
  32
  33 /*
  34  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
  35  *
  36  * Backported in RHEL7 gcc 4.8.5-11
  37  */
  38 #if defined(URCU_GCC_VERSION) && defined(__GNUC_RH_RELEASE__)
  39 # if (URCU_GCC_VERSION == 40805) && (__GNUC_RH_RELEASE__ >= 11)
  40 #  define URCU_GCC_PATCHED_63293
  41 # endif
  42 #endif
  43
  44 #ifdef URCU_GCC_VERSION
  45 # if URCU_GCC_VERSION < 50100 && !defined(URCU_GCC_PATCHED_63293)
  46 #  error Your gcc version performs unsafe access to deallocated stack
  47 # endif
  48 #endif
  49
  50 #define caa_cpu_relax() __asm__ __volatile__ ("yield" : : : "memory")
  51
  52 #ifdef __cplusplus
  53 }
  54 #endif
  55
  56 #include <urcu/arch/generic.h>
  57
  58 #endif /* _URCU_ARCH_AARCH64_H */