mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-18 00:41:06 +00:00
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
|
/* Get address of thread local variable.
|
||
|
|
Copyright (C) 2002 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
||
|
|
|
||
|
|
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 "link.h"
|
||
|
|
#include "thread_dbP.h"
|
||
|
|
|
||
|
|
/* Value used for dtv entries for which the allocation is delayed. */
|
||
|
|
# define TLS_DTV_UNALLOCATED ((void *) -1l)
|
||
|
|
|
||
|
|
|
||
|
|
td_err_e
|
||
|
|
td_thr_tls_get_addr (const td_thrhandle_t *th __attribute__ ((unused)),
|
||
|
|
void *map_address __attribute__ ((unused)),
|
||
|
|
size_t offset __attribute__ ((unused)),
|
||
|
|
void **address __attribute__ ((unused)))
|
||
|
|
{
|
||
|
|
#if USE_TLS
|
||
|
|
size_t modid;
|
||
|
|
union dtv pdtv, *dtvp;
|
||
|
|
|
||
|
|
LOG ("td_thr_tls_get_addr");
|
||
|
|
|
||
|
|
/* Get the DTV pointer from the thread descriptor. */
|
||
|
|
if (ps_pdread (th->th_ta_p->ph,
|
||
|
|
&((struct pthread *) th->th_unique)->header.data.dtvp,
|
||
|
|
&dtvp, sizeof dtvp) != PS_OK)
|
||
|
|
return TD_ERR; /* XXX Other error value? */
|
||
|
|
|
||
|
|
/* Read the module ID from the link_map. */
|
||
|
|
if (ps_pdread (th->th_ta_p->ph,
|
||
|
|
&((struct link_map *) map_address)->l_tls_modid,
|
||
|
|
&modid, sizeof modid) != PS_OK)
|
||
|
|
return TD_ERR; /* XXX Other error value? */
|
||
|
|
|
||
|
|
/* Get the corresponding entry in the DTV. */
|
||
|
|
if (ps_pdread (th->th_ta_p->ph, dtvp + modid,
|
||
|
|
&pdtv, sizeof (union dtv)) != PS_OK)
|
||
|
|
return TD_ERR; /* XXX Other error value? */
|
||
|
|
|
||
|
|
/* It could be that the memory for this module is not allocated for
|
||
|
|
the given thread. */
|
||
|
|
if (pdtv.pointer == TLS_DTV_UNALLOCATED)
|
||
|
|
/* There is not much we can do. */
|
||
|
|
return TD_NOTALLOC;
|
||
|
|
|
||
|
|
*address = (char *) pdtv.pointer + offset;
|
||
|
|
|
||
|
|
return TD_OK;
|
||
|
|
#else
|
||
|
|
return TD_ERR;
|
||
|
|
#endif
|
||
|
|
}
|