diff options
| -rw-r--r-- | linuxthreads_db/td_thr_tls_get_addr.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/linuxthreads_db/td_thr_tls_get_addr.c b/linuxthreads_db/td_thr_tls_get_addr.c new file mode 100644 index 0000000000..7e05070a33 --- /dev/null +++ b/linuxthreads_db/td_thr_tls_get_addr.c @@ -0,0 +1,62 @@ +/* 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" +#include "tls.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, struct link_map *map, + size_t offset, void **address) +{ + 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; +} |