How to determine whether GDB is single-stepping within sim_engine_run() ?

William Tambe via Gdb <[email protected]>
Newsgroups gmane.comp.gdb.devel
Message-ID <CAF8i9mPQ=DY7UMCaLL1kkAr1TfAgCrQAOVJajVDBOOzYjQB9uw@mail.gmail.com> 
Within the sim function sim_engine_run(), is there a way to determine
whether GDB is single-stepping (ie: when using commands next step
nexti stepi) ?

I would like to use that capability to have the simulator disable
interrupts while single-stepping.
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