projects / librseq.git / blame
| Commit | Line | Data |
|---|---|---|
| 90702366 | 1 | /* SPDX-License-Identifier: MIT */ |
| f2d7b530 MJ |
2 | /* SPDX-FileCopyrightText: 2021 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> */ |
| 3 | ||
| 9698c399 MD |
4 | /* |
| 5 | * rseq-x86-thread-pointer.h | |
| 9698c399 MD |
6 | */ |
| 7 | ||
| 8 | #ifndef _RSEQ_X86_THREAD_POINTER | |
| 9 | #define _RSEQ_X86_THREAD_POINTER | |
| 10 | ||
| 11 | #include <features.h> | |
| 12 | ||
| 5984936f MD |
13 | #ifdef __cplusplus |
| 14 | extern "C" { | |
| 15 | #endif | |
| 16 | ||
| 9698c399 MD |
17 | #if __GNUC_PREREQ (11, 1) |
| 18 | static inline void *rseq_thread_pointer(void) | |
| 19 | { | |
| 20 | return __builtin_thread_pointer(); | |
| 21 | } | |
| 22 | #else | |
| 23 | static inline void *rseq_thread_pointer(void) | |
| 24 | { | |
| 25 | void *__result; | |
| 26 | ||
| 27 | # ifdef __x86_64__ | |
| 28 | __asm__ ("mov %%fs:0, %0" : "=r" (__result)); | |
| 29 | # else | |
| 30 | __asm__ ("mov %%gs:0, %0" : "=r" (__result)); | |
| 31 | # endif | |
| 32 | return __result; | |
| 33 | } | |
| 34 | #endif /* !GCC 11 */ | |
| 35 | ||
| 5984936f MD |
36 | #ifdef __cplusplus |
| 37 | } | |
| 38 | #endif | |
| 39 | ||
| 9698c399 | 40 | #endif |