static void cpu_unlink_tb(CPUState *env) { #if defined(CONFIG_USE_NPTL) /* FIXME: TB unchaining isn't SMP safe. For now just ignore the problem and hope the cpu will stop of its own accord. For userspace emulation this often isn't actually as bad as it sounds. Often signals are used primarily to interrupt blocking syscalls. */ #else TranslationBlock *tb; static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED; tb = env->current_tb; /* if the cpu is currently executing code, we must unlink it and all the potentially executing TB */ if (tb && !testandset(&interrupt_lock)) { env->current_tb = NULL; tb_reset_jump_recursive(tb); resetlock(&interrupt_lock); } #endif }