difference between stop_request and quit_request

quit_request is for internal use. This means the IP register was updated and
qemu needs to rebuild the translation blocks.

stop_request is set by the user (uc_emu_stop) to indecate that unicorn sould
stop emulating.

qemu/softmmu/cpus.c

@@ -96,7 +96,7 @@ static int tcg_cpu_exec(struct uc_struct *uc)
             r = cpu_exec(uc, cpu);
 
             // quit current TB but continue emulating?
-            if (uc->quit_request) {
+            if (uc->quit_request && !uc->stop_request) {
                 // reset stop_request
                 uc->stop_request = false;