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/* Definitions for thread-local data handling. fbtl/x86-64 version.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Modification for FreeBSD by Petr Salinger, 2006.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _FREEBSD_TLS_H
#define _FREEBSD_TLS_H
#include <fbtl/sysdeps/x86_64/tls.h>
#ifndef __ASSEMBLER__
#include <sysarch.h>
#include <sys/syscall.h>
#if 0
/* in Linux one; */
/* Magic for libthread_db to know how to do THREAD_SELF. */
# define DB_THREAD_SELF_INCLUDE <sys/reg.h> /* For the FS constant. */
# define DB_THREAD_SELF CONST_THREAD_AREA (64, FS)
#else
/* # warning proper FS constant needed */
# undef DB_THREAD_SELF_INCLUDE
# undef DB_THREAD_SELF
# define DB_THREAD_SELF CONST_THREAD_AREA (64, 25)
#endif
/* Code to initially initialize the thread pointer. This might need
special attention since 'errno' is not yet available and if the
operation can cause a failure 'errno' must not be touched. */
# undef TLS_INIT_TP
# define TLS_INIT_TP(descr) \
({ \
void *_descr = (descr); \
tcbhead_t *head = _descr; \
long int _result; \
\
head->tcb = _descr; \
/* For now the thread descriptor is at the same address. */ \
head->self = _descr; \
\
asm volatile ("syscall" \
: "=a" (_result) \
: "0" ((unsigned long int) SYS_sysarch), \
"D" ((unsigned long int) AMD64_SET_FSBASE), \
"S" (&_descr) \
: "memory", "cc", "cx", "dx", "r8", "r9", "r10", "r11"); \
\
_result ? "cannot set %fs base address for thread-local storage" : 0; \
})
/* in fact this is OS-specific, but we do not have better header for it */
#define NEED_STACK_SIZE_FOR_PTH_CREATE 1
#endif /* __ASSEMBLER__ */
#endif /* tls.h */
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