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glibc/sysdeps/powerpc/nptl/thread_pointer.h

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nptl: Add <thread_pointer.h> for defining __thread_pointer <tls.h> already contains a definition that is quite similar, but it is not consistent across architectures. Only architectures for which rseq support is added are covered. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2021-12-09 08:49:32 +00:00
/* __thread_pointer definition. powerpc version.
Update copyright dates with scripts/update-copyrights
2024-01-01 18:12:26 +00:00
Copyright (C) 2021-2024 Free Software Foundation, Inc.
nptl: Add <thread_pointer.h> for defining __thread_pointer <tls.h> already contains a definition that is quite similar, but it is not consistent across architectures. Only architectures for which rseq support is added are covered. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2021-12-09 08:49:32 +00:00
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
#ifdef __powerpc64__
powerpc: Use global register variable in <thread_pointer.h> A local register variable is merely a compiler hint, and so not appropriate in this context. Move the global register variable into <thread_pointer.h> and include it from <tls.h>, as there can only be one global definition for one particular register. Fixes commit 8dbeb0561eeb876f557ac9eef5721912ec074ea5 ("nptl: Add <thread_pointer.h> for defining __thread_pointer"). Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>
2021-12-15 15:06:25 +00:00
register void *__thread_register asm ("r13");
nptl: Add <thread_pointer.h> for defining __thread_pointer <tls.h> already contains a definition that is quite similar, but it is not consistent across architectures. Only architectures for which rseq support is added are covered. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2021-12-09 08:49:32 +00:00
#else
powerpc: Use global register variable in <thread_pointer.h> A local register variable is merely a compiler hint, and so not appropriate in this context. Move the global register variable into <thread_pointer.h> and include it from <tls.h>, as there can only be one global definition for one particular register. Fixes commit 8dbeb0561eeb876f557ac9eef5721912ec074ea5 ("nptl: Add <thread_pointer.h> for defining __thread_pointer"). Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>
2021-12-15 15:06:25 +00:00
register void *__thread_register asm ("r2");
nptl: Add <thread_pointer.h> for defining __thread_pointer <tls.h> already contains a definition that is quite similar, but it is not consistent across architectures. Only architectures for which rseq support is added are covered. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2021-12-09 08:49:32 +00:00
#endif
powerpc: Use global register variable in <thread_pointer.h> A local register variable is merely a compiler hint, and so not appropriate in this context. Move the global register variable into <thread_pointer.h> and include it from <tls.h>, as there can only be one global definition for one particular register. Fixes commit 8dbeb0561eeb876f557ac9eef5721912ec074ea5 ("nptl: Add <thread_pointer.h> for defining __thread_pointer"). Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>
2021-12-15 15:06:25 +00:00
static inline void *
__thread_pointer (void)
{
return __thread_register;
nptl: Add <thread_pointer.h> for defining __thread_pointer <tls.h> already contains a definition that is quite similar, but it is not consistent across architectures. Only architectures for which rseq support is added are covered. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
2021-12-09 08:49:32 +00:00
}
#endif /* _SYS_THREAD_POINTER_H */
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