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f1717362 | 1 | /* Copyright (C) 2008-2016 Free Software Foundation, Inc. |
4c0315d0 | 2 | Contributed by Richard Henderson <rth@redhat.com>. |
3 | ||
4 | This file is part of the GNU Transactional Memory Library (libitm). | |
5 | ||
6 | Libitm is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | Libitm is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | Under Section 7 of GPL version 3, you are granted additional | |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
24 | ||
25 | #ifdef __x86_64__ | |
26 | # ifndef SYS_futex | |
27 | # define SYS_futex 202 | |
28 | # endif | |
29 | ||
30 | static inline long | |
da3b7968 | 31 | sys_futex0 (std::atomic<int> *addr, int op, int val) |
4c0315d0 | 32 | { |
4c0315d0 | 33 | long res; |
34 | ||
0ea7cdf7 | 35 | register long r10 __asm__("%r10") = 0; |
4c0315d0 | 36 | __asm volatile ("syscall" |
37 | : "=a" (res) | |
0ea7cdf7 | 38 | : "0" (SYS_futex), "D" (addr), "S" (op), |
39 | "d" (val), "r" (r10) | |
4c0315d0 | 40 | : "r11", "rcx", "memory"); |
41 | ||
42 | return res; | |
43 | } | |
44 | ||
45 | #else | |
46 | # ifndef SYS_futex | |
47 | # define SYS_futex 240 | |
48 | # endif | |
49 | ||
4c0315d0 | 50 | static inline long |
da3b7968 | 51 | sys_futex0 (std::atomic<int> *addr, int op, int val) |
4c0315d0 | 52 | { |
53 | long res; | |
54 | ||
55 | __asm volatile ("int $0x80" | |
56 | : "=a" (res) | |
57 | : "0"(SYS_futex), "b" (addr), "c"(op), | |
58 | "d"(val), "S"(0) | |
59 | : "memory"); | |
60 | return res; | |
61 | } | |
62 | ||
4c0315d0 | 63 | #endif /* __x86_64__ */ |