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authorMike Frysinger <vapier@gentoo.org>2005-11-15 03:13:04 +0000
committerMike Frysinger <vapier@gentoo.org>2005-11-15 03:13:04 +0000
commita9f5aa1cc96fc2c71f19a9c3e9dcbee0e78f83ca (patch)
tree2c5d251bdfd06d0a76cec9fc507b1873b4bbbdad /libpthread/linuxthreads.old_db/td_thr_tls_get_addr.c
parentfd6dde5a19092be5bb1990dadd5c595d2ed0b3aa (diff)
rename current stable linuxthreads to linuxthreads.old to prepare for import of latest glibc version
Diffstat (limited to 'libpthread/linuxthreads.old_db/td_thr_tls_get_addr.c')
-rw-r--r--libpthread/linuxthreads.old_db/td_thr_tls_get_addr.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old_db/td_thr_tls_get_addr.c b/libpthread/linuxthreads.old_db/td_thr_tls_get_addr.c
new file mode 100644
index 000000000..e140b77dc
--- /dev/null
+++ b/libpthread/linuxthreads.old_db/td_thr_tls_get_addr.c
@@ -0,0 +1,70 @@
+/* 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)),
+ 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_descr_struct *) th->th_unique)->p_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
+}