| /* Copyright (C) 2005-2014 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _TLS_H |
| # define _TLS_H 1 |
| |
| # include <dl-sysdep.h> |
| |
| #ifndef __ASSEMBLER__ |
| # include <stdbool.h> |
| # include <stddef.h> |
| # include <stdint.h> |
| |
| /* Type for the dtv. */ |
| typedef union dtv |
| { |
| size_t counter; |
| struct |
| { |
| void *val; |
| bool is_static; |
| } pointer; |
| } dtv_t; |
| |
| #else /* __ASSEMBLER__ */ |
| # include <tcb-offsets.h> |
| #endif /* __ASSEMBLER__ */ |
| |
| #ifndef __ASSEMBLER__ |
| |
| /* Get system call information. */ |
| # include <sysdep.h> |
| |
| /* The TP points to the start of the thread blocks. */ |
| # define TLS_DTV_AT_TP 1 |
| |
| /* Get the thread descriptor definition. */ |
| # include <nptl/descr.h> |
| |
| typedef struct |
| { |
| dtv_t *dtv; |
| void *private; |
| } tcbhead_t; |
| |
| static inline void *__microblaze_get_thread_area (void) |
| { |
| register void * volatile __microblaze_thread_area asm ("r21"); |
| return (void *) __microblaze_thread_area; |
| } |
| |
| # define READ_THREAD_POINTER() \ |
| ({ __microblaze_get_thread_area(); }) |
| |
| /* This is the size of the initial TCB. */ |
| # define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) |
| |
| /* Alignment requirements for the initial TCB. */ |
| # define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) |
| |
| /* This is the size of the TCB. */ |
| # define TLS_TCB_SIZE sizeof (tcbhead_t) |
| |
| /* This is the size we need before TCB. */ |
| # define TLS_PRE_TCB_SIZE sizeof (struct pthread) |
| |
| /* Alignment requirements for the TCB. */ |
| # define TLS_TCB_ALIGN __alignof__ (struct pthread) |
| |
| /* Install the dtv pointer. The pointer passed is to the element with |
| index -1 which contain the length. */ |
| # define INSTALL_DTV(tcbp, dtvp) \ |
| (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1) |
| |
| /* Install new dtv for current thread. */ |
| # define INSTALL_NEW_DTV(dtv) \ |
| (THREAD_DTV() = (dtv)) |
| |
| /* Return dtv of given thread descriptor. */ |
| # define GET_DTV(tcbp) \ |
| (((tcbhead_t *) (tcbp))->dtv) |
| |
| /* Code to initially initialize the thread pointer. |
| r21 is reserved for thread pointer. */ |
| # define TLS_INIT_TP(tcbp, secondcall) \ |
| ({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); 0; }) |
| |
| /* Return the address of the dtv for the current thread. */ |
| # define THREAD_DTV() \ |
| (((tcbhead_t *) READ_THREAD_POINTER())->dtv) |
| |
| /* Return the thread descriptor for the current thread. */ |
| # define THREAD_SELF \ |
| (((struct pthread *) READ_THREAD_POINTER()) - 1) |
| |
| /* Magic for libthread_db to know how to do THREAD_SELF. */ |
| # define DB_THREAD_SELF \ |
| CONST_THREAD_AREA (32, sizeof (struct pthread)) |
| |
| /* Read member of the thread descriptor directly. */ |
| # define THREAD_GETMEM(descr, member) (descr->member) |
| |
| /* Same as THREAD_GETMEM, but the member offset can be non-constant. */ |
| # define THREAD_GETMEM_NC(descr, member, idx) \ |
| (descr->member[idx]) |
| |
| /* Set member of the thread descriptor directly. */ |
| # define THREAD_SETMEM(descr, member, value) \ |
| (descr->member = (value)) |
| |
| /* Same as THREAD_SETMEM, but the member offset can be non-constant. */ |
| # define THREAD_SETMEM_NC(descr, member, idx, value) \ |
| (descr->member[idx] = (value)) |
| |
| /* 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. */ |