mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-02-17 13:00:43 +08:00
Code Issues Packages Projects Releases Wiki Activity

nptl: Add <thread_pointer.h> for defining __thread_pointer

Browse Source 
<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>
This commit is contained in:
Florian Weimer 2021-12-09 09:49:32 +01:00
parent 409a735816
commit 8dbeb0561e
3 changed files with 99 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
sysdeps/nptl/thread_pointer.h Normal file
View File

@ -0,0 +1,28 @@
/* __thread_pointer definition. Generic version.
Copyright (C) 2021 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)
{
return __builtin_thread_pointer ();
}
#endif /* _SYS_THREAD_POINTER_H */

33
sysdeps/powerpc/nptl/thread_pointer.h Normal file
View File

@ -0,0 +1,33 @@
/* __thread_pointer definition. powerpc version.
Copyright (C) 2021 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)
{
#ifdef __powerpc64__
register void *__result asm ("r13");
#else
register void *__result asm ("r2");
#endif
return __result;
}
#endif /* _SYS_THREAD_POINTER_H */

38
sysdeps/x86/nptl/thread_pointer.h Normal file
View File

@ -0,0 +1,38 @@
/* __thread_pointer definition. x86 version.
Copyright (C) 2021 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 (11, 1)
return __builtin_thread_pointer ();
#else
void *__result;
# ifdef __x86_64__
__asm__ ("mov %%fs:0, %0" : "=r" (__result));
# else
__asm__ ("mov %%gs:0, %0" : "=r" (__result));
# endif
return __result;
#endif /* !GCC 11 */
}
#endif /* _SYS_THREAD_POINTER_H */