linux-kernel - Re: [uml-devel] [Patch] uml: fix a link error

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Message-ID: <dc84318c0901172223p57872a8cr227d940b1c0a908a@mail.gmail.com>
Date:	Sun, 18 Jan 2009 14:23:46 +0800
From:	Daolong Wang <ahlongxp@...il.com>
To:	Rob Landley <rob@...dley.net>
Cc:	user-mode-linux-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Américo Wang <xiyou.wangcong@...il.com>,
	jdike@...toit.com, linux-kernel@...r.kernel.org
Subject: Re: [uml-devel] [Patch] uml: fix a link error

I can confirm this link error. And this patch works for me.

On Sat, Jan 17, 2009 at 5:28 PM, Rob Landley <rob@...dley.net> wrote:
> On Friday 16 January 2009 14:41:58 Andrew Morton wrote:
>> > diff --git a/arch/um/sys-i386/sys_call_table.S
>> > b/arch/um/sys-i386/sys_call_table.S index 00e5f52..04147dc 100644
>> > --- a/arch/um/sys-i386/sys_call_table.S
>> > +++ b/arch/um/sys-i386/sys_call_table.S
>> > @@ -6,6 +6,7 @@
>> >
>> >  #define sys_vm86old sys_ni_syscall
>> >  #define sys_vm86 sys_ni_syscall
>> > +#define sys_sigprocmask sigprocmask
>> >
>> >  #define old_mmap old_mmap_i386
>>
>> For how long has this problem been present?
>>
>> Why aren't lots of other people reporting it?
>
> I'm not sure User Mode Linux still has a lot of users regularly testing the
> latest and greatest version.  (QEMU and KVM kinda took the wind out of its
> sails.)
>
> I still find it useful to be able to stick printfs into the code and debug
> stuff even when the console isn't working, but I haven't been able to build a
> version of 2.6.28 that works for me at all:
>
> cat > mini.conf << EOF
> CONFIG_BINFMT_ELF=y
> CONFIG_HOSTFS=y
> CONFIG_LBD=y
> CONFIG_BLK_DEV=y
> CONFIG_BLK_DEV_LOOP=y
> CONFIG_STDERR_CONSOLE=y
> CONFIG_UNIX98_PTYS=y
> CONFIG_EXT2_FS=y
> CONFIG_EXT3_FS=y
> CONFIG_STATIC_LINK=y
> CONFIG_NO_HZ=y
> CONFIG_UNEVICTABLE_LRU=y
> EOF
> make ARCH=um allnoconfig KCONFIG_ALLCONFIG=mini.conf
> make ARCH=um -j 3
> ./linux rw init=/bin/bash rootfstype=hostfs
>
> The result panics (twice) and exits, instead of giving me a shell prompt.
> Built and run on stock Ubuntu 8.10.  (I posted about it on tuesday, but nobody
> replied...)
>
> Rob
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