mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 16:50:07 +00:00
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Locate TLS data for a thread.
|
|
Copyright (C) 2003, 2006 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. */
|
|
|
|
#include "thread_dbP.h"
|
|
|
|
td_err_e
|
|
td_thr_tlsbase (const td_thrhandle_t *th,
|
|
unsigned long int modid,
|
|
psaddr_t *base)
|
|
{
|
|
td_err_e err;
|
|
psaddr_t dtv, dtvslot, dtvptr;
|
|
|
|
if (modid < 1)
|
|
return TD_NOTLS;
|
|
|
|
/* Get the DTV pointer from the thread descriptor. */
|
|
err = DB_GET_FIELD (dtv, th->th_ta_p, th->th_unique, pthread, dtvp, 0);
|
|
if (err != TD_OK)
|
|
return err;
|
|
|
|
/* Find the corresponding entry in the DTV. */
|
|
err = DB_GET_FIELD_ADDRESS (dtvslot, th->th_ta_p, dtv, dtv, dtv, modid);
|
|
if (err != TD_OK)
|
|
return err;
|
|
|
|
/* Extract the TLS block address from that DTV slot. */
|
|
err = DB_GET_FIELD (dtvptr, th->th_ta_p, dtvslot, dtv_t, pointer_val, 0);
|
|
if (err != TD_OK)
|
|
return err;
|
|
|
|
/* It could be that the memory for this module is not allocated for
|
|
the given thread. */
|
|
if ((uintptr_t) dtvptr & 1)
|
|
return TD_TLSDEFER;
|
|
|
|
*base = dtvptr;
|
|
return TD_OK;
|
|
}
|