glibc/linuxthreads_db/td_thr_tls_get_addr.c
Roland McGrath 90d1d40b27 * configure.in: Make GCC version check require 3.[2-9]* and no others.
* configure: Regenerated.
	* manual/install.texi (Tools for Compilation): Say 3.2 is required.
	(Configuring and compiling): Don't mention older GCC versions any more.
	* INSTALL: Regenerated.

	* manual/install.texi (Configuring and compiling, Installation,
	Running make install, Linux): Linux -> GNU/Linux where appropriate.

	* elf/rtld.c (_dl_start_final): Move defn before _dl_start so it can
	be inlined.  Declare it with always_inline if [DONT_USE_BOOTSTRAP_MAP]
	and with noinline otherwise.  Remove hack alloca use to prevent
	inlining, we can ask for it explicitly nowadays.
2002-08-22 00:13:04 +00:00

68 lines
2.1 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@cygnus.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)),
struct link_map *map __attribute__ ((unused)),
size_t offset __attribute__ ((unused)),
void **address __attribute__ ((unused)))
{
#if USE_TLS
struct _pthread_descr_struct pds;
size_t modid;
union dtv pdtv;
LOG ("td_thr_tls_get_addr");
/* Get the thread descriptor. */
if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds,
th->th_ta_p->sizeof_descr) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* The module ID. */
modid = map->l_tls_modid;
/* Get the corresponding entry in the DTV. */
if (ps_pdread (th->th_ta_p->ph, pds.p_header.data.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
}