| Message ID | 20240801-rseq-abi-v11-split-v12-4-0e87479dddc0@efficios.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add rseq extensible ABI support | expand |
* Michael Jeanson: > This will be required by the rseq extensible ABI implementation on all > Linux architectures exposing the __rseq_size and __rseq_offset symbols > to set the 'cpu_id' field so applications can test if rseq is > registered. > > Signed-off-by: Michael Jeanson <mjeanson@efficios.com> > --- > sysdeps/riscv/nptl/thread_pointer.h | 34 ++++++++++++++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > > diff --git a/sysdeps/riscv/nptl/thread_pointer.h b/sysdeps/riscv/nptl/thread_pointer.h > new file mode 100644 > index 0000000000..e7f6296e7d > --- /dev/null > +++ b/sysdeps/riscv/nptl/thread_pointer.h > @@ -0,0 +1,34 @@ > +/* __thread_pointer definition. riscv version. > + Copyright (C) 2021-2024 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library 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 > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library. If not, see > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef _SYS_THREAD_POINTER_H > +#define _SYS_THREAD_POINTER_H > + > +static inline void * > +__thread_pointer (void) > +{ > +#if __GNUC_PREREQ (10, 3) > + return __builtin_thread_pointer (); > +#else > + void *__result; > + __asm__ ("mv %0, tp" : "=r" (__result)); > + return __result; > +#endif /* !GCC 10.3 */ > +} > + > +#endif /* _SYS_THREAD_POINTER_H */ Pinging RISC-V maintainers. Thanks, Florian
diff --git a/sysdeps/riscv/nptl/thread_pointer.h b/sysdeps/riscv/nptl/thread_pointer.h new file mode 100644 index 0000000000..e7f6296e7d --- /dev/null +++ b/sysdeps/riscv/nptl/thread_pointer.h @@ -0,0 +1,34 @@ +/* __thread_pointer definition. riscv version. + Copyright (C) 2021-2024 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _SYS_THREAD_POINTER_H +#define _SYS_THREAD_POINTER_H + +static inline void * +__thread_pointer (void) +{ +#if __GNUC_PREREQ (10, 3) + return __builtin_thread_pointer (); +#else + void *__result; + __asm__ ("mv %0, tp" : "=r" (__result)); + return __result; +#endif /* !GCC 10.3 */ +} + +#endif /* _SYS_THREAD_POINTER_H */
This will be required by the rseq extensible ABI implementation on all Linux architectures exposing the __rseq_size and __rseq_offset symbols to set the 'cpu_id' field so applications can test if rseq is registered. Signed-off-by: Michael Jeanson <mjeanson@efficios.com> --- sysdeps/riscv/nptl/thread_pointer.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)