> > This is a case where you almost certainly want to check this > > condition inside QEMU and translate the opcode differently. > > > > See cpu_get_tb_cpu_state, which sets bits in *flags. These > > flags can then be checked in tb->flags while translating. > > At which point you'd avoid all the conditionalization on > > the value in PS here in check_privilege and merely issue > > the exception_cause. > > > > The ARM port is a good example for testing these sorts of bits. > > Actually, while the tb flags are useful, privileged instructions > are usually checked by testing mmu_index, since we already have > to generate different code for the TB based on which TLB entry we > need to access.
Richard, do I understand it right that if I use tb->flags or mem_index to make decisions during translation, then I must issue exit_tb on instructions that can change state they reflect? Thanks. -- Max
