Archipelago » qemu

    case TARGET_NR_get_robust_list:

        /* The ABI for supporting robust futexes has userspace pass

         * the kernel a pointer to a linked list which is updated by

         * userspace after the syscall; the list is walked by the kernel

         * when the thread exits. Since the linked list in QEMU guest

         * memory isn't a valid linked list for the host and we have

         * no way to reliably intercept the thread-death event, we can't

         * support these. Silently return ENOSYS so that guest userspace

         * falls back to a non-robust futex implementation (which should

         * be OK except in the corner case of the guest crashing while

         * holding a mutex that is shared with another process via

         * shared memory).

         */

        goto unimplemented_nowarn;