180 lines
5.5 KiB
C
180 lines
5.5 KiB
C
/* Definitions for thread-local data handling. NPTL/sparc version.
|
|
Copyright (C) 2003, 2005, 2006, 2007 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _TLS_H
|
|
#define _TLS_H
|
|
|
|
#include <dl-sysdep.h>
|
|
#ifndef __ASSEMBLER__
|
|
# include <stdbool.h>
|
|
# include <stddef.h>
|
|
# include <stdint.h>
|
|
# include <stdlib.h>
|
|
# include <list.h>
|
|
# include <kernel-features.h>
|
|
|
|
/* Type for the dtv. */
|
|
typedef union dtv
|
|
{
|
|
size_t counter;
|
|
struct
|
|
{
|
|
void *val;
|
|
bool is_static;
|
|
} pointer;
|
|
} dtv_t;
|
|
|
|
typedef struct
|
|
{
|
|
void *tcb; /* Pointer to the TCB. Not necessary the
|
|
thread descriptor used by libpthread. */
|
|
dtv_t *dtv;
|
|
void *self;
|
|
int multiple_threads;
|
|
#if __WORDSIZE == 64
|
|
int gscope_flag;
|
|
#endif
|
|
uintptr_t sysinfo;
|
|
uintptr_t stack_guard;
|
|
uintptr_t pointer_guard;
|
|
#if __WORDSIZE != 64
|
|
int gscope_flag;
|
|
#endif
|
|
#ifndef __ASSUME_PRIVATE_FUTEX
|
|
int private_futex;
|
|
#endif
|
|
} tcbhead_t;
|
|
|
|
#else /* __ASSEMBLER__ */
|
|
# include <tcb-offsets.h>
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
/* We require TLS support in the tools. */
|
|
#ifndef HAVE_TLS_SUPPORT
|
|
# error "TLS support is required."
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLER__
|
|
/* Get system call information. */
|
|
# include <sysdep.h>
|
|
|
|
/* Get the thread descriptor definition. */
|
|
# include <nptl/descr.h>
|
|
|
|
register struct pthread *__thread_self __asm__("%g7");
|
|
|
|
/* This is the size of the initial TCB. Can't be just sizeof (tcbhead_t),
|
|
because NPTL getpid, __libc_alloca_cutoff etc. need (almost) the whole
|
|
struct pthread even when not linked with -lpthread. */
|
|
# define TLS_INIT_TCB_SIZE sizeof (struct pthread)
|
|
|
|
/* Alignment requirements for the initial TCB. */
|
|
# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
|
|
|
|
/* This is the size of the TCB. */
|
|
# define TLS_TCB_SIZE sizeof (struct pthread)
|
|
|
|
/* Alignment requirements for the TCB. */
|
|
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
|
|
|
|
/* The TCB can have any size and the memory following the address the
|
|
thread pointer points to is unspecified. Allocate the TCB there. */
|
|
# define TLS_TCB_AT_TP 1
|
|
|
|
/* Install the dtv pointer. The pointer passed is to the element with
|
|
index -1 which contain the length. */
|
|
# define INSTALL_DTV(descr, dtvp) \
|
|
((tcbhead_t *) (descr))->dtv = (dtvp) + 1
|
|
|
|
/* Install new dtv for current thread. */
|
|
# define INSTALL_NEW_DTV(DTV) \
|
|
(((tcbhead_t *) __thread_self)->dtv = (DTV))
|
|
|
|
/* Return dtv of given thread descriptor. */
|
|
# define GET_DTV(descr) \
|
|
(((tcbhead_t *) (descr))->dtv)
|
|
|
|
/* Code to initially initialize the thread pointer. */
|
|
# define TLS_INIT_TP(descr, secondcall) \
|
|
(__thread_self = (__typeof (__thread_self)) (descr), NULL)
|
|
|
|
/* Return the address of the dtv for the current thread. */
|
|
# define THREAD_DTV() \
|
|
(((tcbhead_t *) __thread_self)->dtv)
|
|
|
|
/* Return the thread descriptor for the current thread. */
|
|
#define THREAD_SELF __thread_self
|
|
|
|
/* Magic for libthread_db to know how to do THREAD_SELF. */
|
|
# define DB_THREAD_SELF_INCLUDE <sys/ucontext.h>
|
|
# define DB_THREAD_SELF \
|
|
REGISTER (32, 32, REG_G7 * 4, 0) REGISTER (64, 64, REG_G7 * 8, 0)
|
|
|
|
/* Access to data in the thread descriptor is easy. */
|
|
#define THREAD_GETMEM(descr, member) \
|
|
descr->member
|
|
#define THREAD_GETMEM_NC(descr, member, idx) \
|
|
descr->member[idx]
|
|
#define THREAD_SETMEM(descr, member, value) \
|
|
descr->member = (value)
|
|
#define THREAD_SETMEM_NC(descr, member, idx, value) \
|
|
descr->member[idx] = (value)
|
|
|
|
/* Set the stack guard field in TCB head. */
|
|
#define THREAD_SET_STACK_GUARD(value) \
|
|
THREAD_SETMEM (THREAD_SELF, header.stack_guard, value)
|
|
# define THREAD_COPY_STACK_GUARD(descr) \
|
|
((descr)->header.stack_guard \
|
|
= THREAD_GETMEM (THREAD_SELF, header.stack_guard))
|
|
|
|
/* Get/set the stack guard field in TCB head. */
|
|
#define THREAD_GET_POINTER_GUARD() \
|
|
THREAD_GETMEM (THREAD_SELF, header.pointer_guard)
|
|
#define THREAD_SET_POINTER_GUARD(value) \
|
|
THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value)
|
|
# define THREAD_COPY_POINTER_GUARD(descr) \
|
|
((descr)->header.pointer_guard = THREAD_GET_POINTER_GUARD ())
|
|
|
|
/* Get and set the global scope generation counter in struct pthread. */
|
|
#define THREAD_GSCOPE_FLAG_UNUSED 0
|
|
#define THREAD_GSCOPE_FLAG_USED 1
|
|
#define THREAD_GSCOPE_FLAG_WAIT 2
|
|
#define THREAD_GSCOPE_RESET_FLAG() \
|
|
do \
|
|
{ int __res \
|
|
= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \
|
|
THREAD_GSCOPE_FLAG_UNUSED); \
|
|
if (__res == THREAD_GSCOPE_FLAG_WAIT) \
|
|
lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \
|
|
} \
|
|
while (0)
|
|
#define THREAD_GSCOPE_SET_FLAG() \
|
|
do \
|
|
{ \
|
|
THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \
|
|
atomic_write_barrier (); \
|
|
} \
|
|
while (0)
|
|
#define THREAD_GSCOPE_WAIT() \
|
|
GL(dl_wait_lookup_done) ()
|
|
|
|
#endif /* !ASSEMBLER */
|
|
|
|
#endif /* tls.h */
|