long do_sigreturn(CPUM68KState *env)

{

    struct target_sigframe *frame;

    abi_ulong frame_addr = env->aregs[7] - 4;

    target_sigset_t target_set;

    sigset_t set;

    int d0, i;



    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))

        goto badframe;



    



    if (__get_user(target_set.sig[0], &frame->sc.sc_mask))

        goto badframe;



    for(i = 1; i < TARGET_NSIG_WORDS; i++) {

        if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))

            goto badframe;

    }



    target_to_host_sigset_internal(&set, &target_set);

    sigprocmask(SIG_SETMASK, &set, NULL);



    



    if (restore_sigcontext(env, &frame->sc, &d0))

        goto badframe;



    unlock_user_struct(frame, frame_addr, 0);

    return d0;



badframe:

    unlock_user_struct(frame, frame_addr, 0);

    force_sig(TARGET_SIGSEGV);

    return 0;

}
