mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 15:20:10 +00:00
535b764df5
* elf/rtld.c (_dl_start_final): Allocate TLS and initialize thread-pointer as soon as possible. * sysdeps/generic/ldsodefs.h: Include <tls.h>. Define first TLS elements in rtld_global. * sysdeps/generic/tls.h: New file. * elf/Makefile (distribute): Add tls.h. * sysdeps/i386/dl-machine.h (elf_machine_rel): Add support for TLS relocations. Not complete yet. * resolv/resolv.h: Allow user to define __need_res_state and only define __res_start structure then. * include/resolv.h: Only declare functions if _RESOLV_H_ is defined.
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* Get a thread-specific data pointer for a thread.
|
|
Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
|
|
|
|
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"
|
|
#include <linuxthreads/internals.h>
|
|
|
|
|
|
td_err_e
|
|
td_thr_tsd (const td_thrhandle_t *th, const thread_key_t tk, void **data)
|
|
{
|
|
struct _pthread_descr_struct pds;
|
|
struct pthread_key_struct *keys = th->th_ta_p->keys;
|
|
struct pthread_key_struct key;
|
|
int pthread_keys_max = th->th_ta_p->pthread_keys_max;
|
|
int pthread_key_2ndlevel_size = th->th_ta_p->pthread_key_2ndlevel_size;
|
|
unsigned int idx1st;
|
|
unsigned int idx2nd;
|
|
void *p;
|
|
|
|
LOG ("td_thr_tsd");
|
|
|
|
/* Get the thread descriptor. */
|
|
if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds,
|
|
sizeof (struct _pthread_descr_struct)) != PS_OK)
|
|
return TD_ERR; /* XXX Other error value? */
|
|
|
|
/* Check correct value of key. */
|
|
if (tk >= pthread_keys_max)
|
|
return TD_BADKEY;
|
|
|
|
/* Get the key entry. */
|
|
if (ps_pdread (th->th_ta_p->ph, keys, &key,
|
|
sizeof (struct pthread_key_struct)) != PS_OK)
|
|
return TD_ERR; /* XXX Other error value? */
|
|
|
|
/* Fail if this key is not at all used. */
|
|
if (! key.in_use)
|
|
return TD_BADKEY;
|
|
|
|
/* Compute the indeces. */
|
|
idx1st = tk / pthread_key_2ndlevel_size;
|
|
idx2nd = tk % pthread_key_2ndlevel_size;
|
|
|
|
/* Check the pointer to the second level array. */
|
|
if (pds.p_specific[idx1st] == NULL)
|
|
return TD_NOTSD;
|
|
|
|
/* Now get the real key.
|
|
XXX I don't know whether it's correct but there is currently no
|
|
easy way to determine whether a key was never set or the value
|
|
is NULL. We return an error whenever the value is NULL. */
|
|
if (ps_pdread (th->th_ta_p->ph, &pds.p_specific[idx1st][idx2nd], &p,
|
|
sizeof (void *)) != PS_OK)
|
|
return TD_ERR;
|
|
|
|
if (p != NULL)
|
|
*data = p;
|
|
|
|
return p != NULL ? TD_OK : TD_NOTSD;
|
|
}
|