include/urcu/arch/aarch64.h

   1 #ifndef _URCU_ARCH_AARCH64_H
   2 #define _URCU_ARCH_AARCH64_H
   3
   4 /*
   5  * arch/aarch64.h: definitions for aarch64 architecture
   6  *
   7  * Copyright (c) 2010 Paul E. McKenney, IBM Corporation.
   8  * Copyright (c) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  25 #include <urcu/compiler.h>
  26 #include <urcu/config.h>
  27 #include <urcu/syscall-compat.h>
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include <stdlib.h>
  34 #include <sys/time.h>
  35
  36 /*
  37  * On Linux, define the membarrier system call number if not yet available in
  38  * the system headers. aarch64 implements asm-generic/unistd.h system call
  39  * numbers.
  40  */
  41 #if (defined(__linux__) && !defined(__NR_membarrier))
  42 #define __NR_membarrier         283
  43 #endif
  44
  45 /*
  46  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
  47  *
  48  * Backported in RHEL7 gcc 4.8.5-11
  49  */
  50 #if defined(URCU_GCC_VERSION) && defined(__GNUC_RH_RELEASE__)
  51 # if (URCU_GCC_VERSION == 40805) && (__GNUC_RH_RELEASE__ >= 11)
  52 #  define URCU_GCC_PATCHED_63293
  53 # endif
  54 #endif
  55
  56 #ifdef URCU_GCC_VERSION
  57 # if URCU_GCC_VERSION < 50100 && !defined(URCU_GCC_PATCHED_63293)
  58 #  error Your gcc version performs unsafe access to deallocated stack
  59 # endif
  60 #endif
  61
  62 #define caa_cpu_relax() __asm__ __volatile__ ("yield" : : : "memory")
  63
  64 #ifdef __cplusplus
  65 }
  66 #endif
  67
  68 #include <urcu/arch/generic.h>
  69
  70 #endif /* _URCU_ARCH_AARCH64_H */