Clean excessive inline asm, mention tap0 in README.

umka_os.c

@@ -13,12 +13,7 @@
 #define MONITOR_THREAD_STACK_SIZE 0x100000
 
 void monitor() {
-    __asm__ __inline__ __volatile__ (
-        "pushfd;"
-        "btr dword ptr[esp], 21;"
-        "popfd"
-        : : : "memory");
-
+    umka_sti();
     fprintf(stderr, "Start monitor thread\n");
 //    mkfifo("/tmp/umka.fifo.2u", 0644);
 //    mkfifo("/tmp/umka.fifo.4u", 0644);
@@ -39,12 +34,7 @@ struct itimerval timeout = {.it_value = {.tv_sec = 0, .tv_usec = 10000},
                             .it_interval = {.tv_sec = 0, .tv_usec = 10000}};
 
 int main() {
-    __asm__ __inline__ __volatile__ (
-        "pushfd;"
-        "btr dword ptr[esp], 21;"
-        "popfd"
-        : : : "memory");
-
+    umka_sti();
     umka_tool = UMKA_OS;
 
     struct sigaction sa;
@@ -57,7 +47,6 @@ int main() {
         return 1;
     }
 
-
 /*
     void *app_base = mmap((void*)0x000000, 16*0x100000, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
     if (app_base == MAP_FAILED) {
@@ -67,8 +56,8 @@ int main() {
 */
     printf("pid=%d, kos_lfb_base=%p\n", getpid(), (void*)kos_lfb_base);
 
-    kos_init();
-    kos_stack_init();
+    umka_init();
+    umka_stack_init();
     uint8_t *monitor_stack = malloc(MONITOR_THREAD_STACK_SIZE);
     umka_new_sys_threads(0, monitor, monitor_stack + MONITOR_THREAD_STACK_SIZE);
 
@@ -80,7 +69,7 @@ int main() {
 
     setitimer(ITIMER_PROF, &timeout, NULL);
 
-    osloop();   // doesn't return
+    kos_osloop();   // doesn't return
 
     return 0;
 }