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author | Ian Wienand <ianw@gelato.unsw.edu.au> | 2007-11-20 14:12:46 +1100 |
---|---|---|
committer | Tony Luck <tony.luck@intel.com> | 2007-12-19 11:06:40 -0800 |
commit | e384f41409cb9e543fbc84b375e2ba46cbcbec6a (patch) | |
tree | b0b47dd81e493ebc3c06878ad61dcb8882231c9c /include/asm-ia64/sn/xp.h | |
parent | ee211b37aa98123b1d9b19d228011e632a4bbe75 (diff) |
[IA64] set_thread_area fails in IA32 chroot
I tried to upgrade an IA32 chroot on my IA64 to a new glibc with TLS.
It kept dying because set_thread_area was returning -ESRCH
(bugs.debian.org/451939).
I instrumented arch/ia64/ia32/sys_ia32.c:get_free_idx() and ended up
seeing output like
[pid] idx desc->a desc->b
-----------------------------
[2710] 0 -> c6b0ffff 40dff31b
[2710] 1 -> 0 0
[2710] 2 -> 0 0
[2710] 0 -> c6b0ffff 40dff31b
[2710] 1 -> c6b0ffff 40dff31b
[2710] 2 -> 0 0
[2711] 0 -> c6b0ffff 40dff31b
[2711] 1 -> c6b0ffff 40dff31b
[2711] 2 -> 48c0ffff 40dff317
which suggested to me that TLS pointers were surviving exec() calls,
leading to GDT pointers filling up and the eventual failure of
get_free_idx().
I think the solution is flushing the tls array on exec.
Signed-Off-By: Ian Wienand <ianw@gelato.unsw.edu.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64/sn/xp.h')
0 files changed, 0 insertions, 0 deletions