[Buildroot] Login on a ttyS fails

["Stéphane Mancini" <stephane.mancini@grenoble-inp.fr>]

Hi,
I'm trying to set up linux on a Xilinx platform.
The boot starts but the root login fails 
after prompting :


I've made some prompt in login.c (busybox) and I have the following

################ LOG ######################
boot stuff 
init started: BusyBox v1.12.0 (2008-09-16 16:37:51 CEST)
command='/bin/mount -t proc proc /proc' action=1 tty='/dev/null'

command='/etc/init.d/rcS' action=1 tty=''

command='/sbin/getty -L ttyUL0 57600 vt100 ' action=2 tty='/dev/ttyUL0'

command='/bin/touch /var/log/messages' action=1 tty='/dev/null'

command='/sbin/reboot' action=32 tty=''

command='/sbin/swapoff -a' action=64 tty='/dev/null'

Welcome to the Erik's uClibc development environment.
(none) login: root
Dec 31 17:00:12 login[169]: root login succeeded  on the TTY : 'ttyUL0'
-> /bin/ash
Dec 31 17:00:12 login[169]: Run t


Welcome to the Erik's uClibc development environment.
(none) login: 

#######

I've modified the login.c text to be sure of which code is executing.

It appears that it goes up to the call to the shell. But, then, nothing
happens. 
I've put a 
	syslog(LOG_INFO, "Get to the shell ash!!\n");
at the begining of ash.c:ash_main(int argc UNUSED_PARAM, char **argv)
It's never displayed !

I've also modified inittab to execute "ash" instead of "/init" but
nothing happen also.

It seems that there's a trouble with the shell......

I'm using the Xilinx UARTLITE and the driver comming with linux 2.6.26.2

Maybe there's something wrong with this device but it seems to work
perfectly since I can see all the boot process !

Please, can you tell me :
 what are the configuration parameters to be set to run a a shell on
this tty properly ?
To mean, in buildroot, busybox, libc, linux, etc ....

I set the console on ttyUL0. Is it correct ?

Greetings !

St?phane Mancini


-- 
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