| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Machine-dependent pthreads configuration and inline functions. |
| 2 | Xtensa version. |
| 3 | |
| 4 | Copyright (C) 2007 Free Software Foundation, Inc. |
| 5 | This file is part of the GNU C Library. |
| 6 | |
| 7 | The GNU C Library is free software; you can redistribute it and/or |
| 8 | modify it under the terms of the GNU Lesser General Public |
| 9 | License as published by the Free Software Foundation; either |
| 10 | version 2.1 of the License, or (at your option) any later version. |
| 11 | |
| 12 | The GNU C Library is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | Lesser General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU Lesser General Public |
| 18 | License along with the GNU C Library; if not, write to the Free |
| 19 | Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #ifndef _PT_MACHINE_H |
| 23 | #define _PT_MACHINE_H 1 |
| 24 | |
| 25 | #include <sys/syscall.h> |
| 26 | #include <asm/unistd.h> |
| 27 | |
| 28 | #ifndef PT_EI |
| 29 | # define PT_EI __extern_always_inline |
| 30 | #endif |
| 31 | |
| 32 | /* Memory barrier. */ |
| 33 | #define MEMORY_BARRIER() __asm__ ("memw" : : : "memory") |
| 34 | |
| 35 | /* Spinlock implementation; required. */ |
| 36 | PT_EI long int |
| 37 | testandset (int *spinlock) |
| 38 | { |
| 39 | int unused = 0; |
| 40 | return INTERNAL_SYSCALL (xtensa, , 4, SYS_XTENSA_ATOMIC_SET, |
| 41 | spinlock, 1, unused); |
| 42 | } |
| 43 | |
| 44 | /* Get some notion of the current stack. Need not be exactly the top |
| 45 | of the stack, just something somewhere in the current frame. */ |
| 46 | #define CURRENT_STACK_FRAME __builtin_frame_address (0) |
| 47 | |
| 48 | #endif /* _PT_MACHINE_H */ |