IRC.

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+[[!meta copyright="Copyright © 2011 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
+License|/fdl]]."]]"""]]
+
+[[!tag open_issue_porting]]
+
+IRC, freenode, #hurd, 2011-08-12
+
+    < zyg> did the segment registers had any purpose? I see fs is set equal to
+      others, but on linux fs is 0 (atleast on this x86 box).
+    < braunr> zyg: it can be used by special applications like wine, yes
+    < zyg> braunr: thanks.. I'm reading up on linux actually. It seems gs can
+      be used for TLS, fs in syscall to pass userspace.
+    < braunr> zyg: why are you interested in that ?
+    < zyg> a native compiler under linux places assumptions on fs register. So
+      I'm trying to find out what it should do under gnumach/hurd.
+    < braunr> what compiler ?
+    < zyg> braunr: it's sbcl
+    < braunr> ok
+    < youpi> zyg: the same, basically
+    < zyg> ok.. looking at the code, I've remarked where it sets up FS, because
+      /usr/include/asm/ldt.h:struct user_desc is missing. I must search for the
+      equiv.
+    < youpi> zyg: mach/i386/mach_i386.h
+    < youpi> the descriptor structure