For me it worked to build the guest system from scratch as long as glibc
was built with "--without-tls". I don't think you need to rebuild the
host.
I've built a root_fs for i686, based on gentoo, with tls disabled. Works
for me. If you're interested it's at
http://gathering.itm.mh.se/~joepal/uml/root_fs-i686minimal.bz2
For use flags and etc, see
http://gathering.itm.mh.se/~joepal/uml/make.conf.i686minimal
(The trick here was to set host as i386, while in gcc flags explicitly
setting arch to i686. That way you get an i686-optimized system, but
without TLS)
// Joel
On Wed, 2 Nov 2005, Tassilo Horn wrote:
Hi,
when I want to start uml I get:
NET: Registered protocol family 1
Initialized stdio console driver
Console initialized on /dev/tty0
ubda: unknown partition table
VFS: Mounted root (ext2 filesystem) readonly.
cannot set up thread-local storage: set_thread_area failed when setting
up thread-local storage
Kernel panic - not syncing: Attempted to kill init!
EIP: 0073:[<400109df>] CPU: 0 Not tainted ESP: 007b:bf59ca40 EFLAGS:
00200246
Not tainted
EAX: ffffffda EBX: 0000007f ECX: bf59c820 EDX: 00000003
ESI: 400129a0 EDI: 40012960 EBP: bf59cc18 DS: 007b ES: 007b
a08a3b40: [<a0030e1b>] printk+0x1b/0x20
a08a3b50: [<a004294d>] notifier_call_chain+0x2d/0x50
a08a3b60: [<a010d664>] bust_spinlocks+0x44/0x50
a08a3b70: [<a0030275>] panic+0x75/0x130
a08a3ba0: [<a00332fb>] do_exit+0x2cb/0x340
a08a3bc0: [<a007695c>] vfs_writev+0x4c/0x70
a08a3be0: [<a0033426>] do_group_exit+0x76/0xc0
a08a3c10: [<a001b834>] execute_syscall_skas+0xf4/0x180
a08a3c34: [<a0033470>] sys_exit_group+0x0/0x20
a08a3c70: [<a001b8de>] handle_syscall+0x1e/0x40
a08a3c80: [<a001b148>] userspace+0x238/0x360
a08a3ce8: [<a000d1b0>] init+0x0/0x110
a08a3cf0: [<a001b3c8>] new_thread_handler+0xb8/0xd0
When I searched the mailing list archives I found a tip about
moving /lib/tls, but I don't have such a directory: Neither on my host
nor on my root_fs.
I think the problem is that I've built glibc with NTPL support and
without linux threads. So do I have to rebuild it with linux threads to
get it work? Only on the uml guests root_fs or do I have to rebuild my
hosts glibc, too?
Much thanks in advance,
Tassilo
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