path: root/open_issues/glibc_tls_segment_tcbhead_t_dtv_offset.mdwn
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authorThomas Schwinge <>2010-07-30 14:50:28 +0200
committerThomas Schwinge <>2010-07-30 14:50:28 +0200
commitc8eb5b98b4a96ba17bc83fda2f13e31a76db9d10 (patch)
treef3be0b9bc6247771b37f9ec324a1a6f9ea41a500 /open_issues/glibc_tls_segment_tcbhead_t_dtv_offset.mdwn
parent10f3d9713b95cbc8718dee2cdc54a8de2ee82c0b (diff)
open_issues/glibc_tls_segment_tcbhead_t_dtv_offset: New.
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+[[!meta copyright="Copyright © 2010 Free Software Foundation, Inc."]]
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
+is included in the section entitled [[GNU Free Documentation
+[[!tag open_issue_glibc]]
+IRC, unknown channel, unknown date.
+ <youpi> you can hardcode DTV_OFFSET as 4 for now
+ <youpi> it's the offset of the dtv field in the tcbhead_t structure from hurd/libpthread
+ <tschwinge> youpi: May very well be that I'm misunderstanding something, but wouldn't it rather be the offset of tcb in __pthread + the offset of dtv in tcbhead_t (which indeed is 4)?
+ <youpi> what you don't know is that DTV_OFFSET is not relative to __pthread, but to the tls segment
+ <tschwinge> Oh, aha. Thanks.
+ <youpi> and drepper abused the fact that in nptl __pthread appears at the start of the tls segment