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I'm doing some experimental work on Darwin/x86 that involves a
requirement to allocate an LDT (or GDT) entry and there appears to be a
perfectly nice kernel function to do it:
thread_set_user_ldt(), in osfmk/i386/bsd_i386.c
Unfortunately, I don't see any kind of corresponding header in
/usr/include, so presumably this kernel function isn't accessible
through libSystem - is there some way that I can call it directly from
user code? If so, where can I find documentation and/or sample code for
doing so?
It looks like the function goes through the machdep call table defined
in osfmk/i386/machdep_call.c, and there's an exported kernel symbol for
this table - but again, the table doesn't appear to be accessible from
libSystem, so I'm not sure how user code can access it. Also, is there
any assurance that the machdep call table order will remain the same
across different versions of darwin?
Thanks,
-Gav
--
Gavriel State
email@hidden
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