Is there a way to know if it is privilege mode?

[jaejynshin]

Hello Expert

I want to know if current running app is privilege mode or not.

The simplest way is check MSR but if it is not privilege mode, Program Exception occurs.

Is there a safe way to check which the mode without Exception or Interrupt?

Thank you
Jaejyn

[davidtosenovjan]

You will have to temporarily switch into supervisor mode by system call instruction that invokes IVOR8 exception and copies actual MSR content to SRR1 register.