| /* Copyright (C) 2008-2018 Free Software Foundation, Inc. |
| Contributed by Richard Henderson <rth@redhat.com>. |
| |
| This file is part of the GNU Transactional Memory Library (libitm). |
| |
| Libitm is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| Libitm is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef __x86_64__ |
| # ifndef SYS_futex |
| # define SYS_futex 202 |
| # endif |
| |
| static inline long |
| sys_futex0 (std::atomic<int> *addr, int op, int val) |
| { |
| long res; |
| |
| register long r10 __asm__("%r10") = 0; |
| __asm volatile ("syscall" |
| : "=a" (res) |
| : "0" (SYS_futex), "D" (addr), "S" (op), |
| "d" (val), "r" (r10) |
| : "r11", "rcx", "memory"); |
| |
| return res; |
| } |
| |
| #else |
| # ifndef SYS_futex |
| # define SYS_futex 240 |
| # endif |
| |
| static inline long |
| sys_futex0 (std::atomic<int> *addr, int op, int val) |
| { |
| long res; |
| |
| __asm volatile ("int $0x80" |
| : "=a" (res) |
| : "0"(SYS_futex), "b" (addr), "c"(op), |
| "d"(val), "S"(0) |
| : "memory"); |
| return res; |
| } |
| |
| #endif /* __x86_64__ */ |