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Message-ID: <49752649.3000508@hathawaymix.org>
Date: Mon, 19 Jan 2009 18:18:01 -0700
From: Shane Hathaway <shane@...hawaymix.org>
To: linux-kernel@...r.kernel.org
Subject: uml: sigprocmask fix
I just ran into the same issue described here:
http://lkml.org/lkml/2009/1/15/194
Like Americo Wang, my user mode linux compile failed when attempting to
link ".tmp_vmlinux". However, his patch is probably wrong. The problem
is that the name "sigprocmask" is getting renamed to
"kernel_sigprocmask" by a compiler directive in arch/um/Makefile, then
that name gets mangled into "sys_kernel_sigprocmask" by the
SYSCALL_DEFINE3(sigprocmask, ...) macro in kernel/signal.c.
So I added the following line to arch/um/sys-i386/sys_call_table.S:
#define sys_sigprocmask sys_kernel_sigprocmask
This made it compile and link correctly. Look at the symbols generated
by the compile of signal.c to see what I mean:
# nm kernel/signal.o | grep sigprocmask
0000008f r __kstrtab_kernel_sigprocmask
00000040 r __ksymtab_kernel_sigprocmask
00001ea6 T kernel_sigprocmask
00002d67 T sys_kernel_sigprocmask
00001faf T sys_rt_sigprocmask
Unfortunately, it's a mystery to me that others haven't run into this
before.
Shane
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