so it is not possible to have a longjmp happening while an emulated cpu is in the middle of translating code ( i.e. in frontend or tcg).
Xin On Mon, Apr 23, 2012 at 12:02 PM, Peter Maydell <peter.mayd...@linaro.org> wrote: > On 23 April 2012 01:06, Xin Tong <xerox.time.t...@gmail.com> wrote: >> 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 ). > > We don't do a longjmp for interrupts. Mostly they're used for > exceptions (eg "memory access faulted"), so they only happen > in fairly restricted contexts where it is safe to longjmp. > > -- PMM
