projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 75f9527c | 1 | /* Copyright (C) 2008-2013 Free Software Foundation, Inc. |
| 0a35513e AH |
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 | |
| 799142bf | 31 | sys_futex0 (std::atomic<int> *addr, long op, long val) |
| 0a35513e AH |
32 | { |
| 33 | register long r10 __asm__("%r10") = 0; | |
| 34 | long res; | |
| 35 | ||
| 36 | __asm volatile ("syscall" | |
| 37 | : "=a" (res) | |
| 38 | : "0" (SYS_futex), "D" (addr), "S" (op), "d" (val), "r" (r10) | |
| 39 | : "r11", "rcx", "memory"); | |
| 40 | ||
| 41 | return res; | |
| 42 | } | |
| 43 | ||
| 44 | #else | |
| 45 | # ifndef SYS_futex | |
| 46 | # define SYS_futex 240 | |
| 47 | # endif | |
| 48 | ||
| 49 | # ifdef __PIC__ | |
| 50 | ||
| 51 | static inline long | |
| 799142bf | 52 | sys_futex0 (std::atomic<int> *addr, int op, int val) |
| 0a35513e AH |
53 | { |
| 54 | long res; | |
| 55 | ||
| 56 | __asm volatile ("xchgl\t%%ebx, %2\n\t" | |
| 57 | "int\t$0x80\n\t" | |
| 58 | "xchgl\t%%ebx, %2" | |
| 59 | : "=a" (res) | |
| 60 | : "0"(SYS_futex), "r" (addr), "c"(op), | |
| 61 | "d"(val), "S"(0) | |
| 62 | : "memory"); | |
| 63 | return res; | |
| 64 | } | |
| 65 | ||
| 66 | # else | |
| 67 | ||
| 68 | static inline long | |
| 799142bf | 69 | sys_futex0 (std::atomic<int> *addr, int op, int val) |
| 0a35513e AH |
70 | { |
| 71 | long res; | |
| 72 | ||
| 73 | __asm volatile ("int $0x80" | |
| 74 | : "=a" (res) | |
| 75 | : "0"(SYS_futex), "b" (addr), "c"(op), | |
| 76 | "d"(val), "S"(0) | |
| 77 | : "memory"); | |
| 78 | return res; | |
| 79 | } | |
| 80 | ||
| 81 | # endif /* __PIC__ */ | |
| 82 | #endif /* __x86_64__ */ |