[Qemu-devel] setjmp and longjmp in qemu

[Xin Tong]

QEMU uses this very hard to understand setjmp and longjmp to handle
asynchronous interrupt. what i do not understand is that say one of
the process is doing a context switching in the guest os. tlb_flush
gets called, what if in the middle of tlb_flush, an interrupt comes in
( longjmp executed ).  does not qemu need to rolled back and
re-execute the context switch instruction ?

Thanks

Xin