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

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Message-Id: <200901170328.15178.rob@landley.net>
Date:	Sat, 17 Jan 2009 03:28:14 -0600
From:	Rob Landley <rob@...dley.net>
To:	user-mode-linux-devel@...ts.sourceforge.net
Cc:	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

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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