In Solaris 10 U5 sparc server, getting error related to SIGSYS

After restarting my solaris 10 U3 sparc server, I am getting error related to SIGSYS and server is going into single user mode.
When I try to do anything in single user mode getting an error "BAD system call" and the commands are terminating.

Please  advice on how to troubleshoot  this problem and rectify it.
Deepti_vobilineniAsked:
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omarfaridConnect With a Mentor Commented:
How the system was restarted? did you encountered any power failure?

What type of disk partitions are you using? are using volume manager ?

when you enter single user mode, can you run the following command

fsck -y

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omarfaridCommented:
have you done any changes on your system recently? What is the error message you are getting?
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Deepti_vobilineniAuthor Commented:
No...we have not made any changes offlate....exact error message appears as below,

Requesting System Maintenance Mode
svc.configd signalled: SYS
Root password for system maintenance:
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Deepti_vobilineniAuthor Commented:
There was a scheduled power shutdown last weekend for a maintenance activity, hence I have shutdown the server on friday and again started it this morning.

We are using "UFS" filesystem....no volume manager.

Yes, I am able to run fsck -y, it has done changes to the filesystem...but even after that getting "Bad System Call" error when tr to mount FS.
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omarfaridCommented:
did you install any patches before that? do you have a valid / recent full backup of your system?
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