long do_rt_sigreturn(CPUState *env) { struct rt_sigframe *frame; sigset_t host_set; /* * Since we stacked the signal on a 64-bit boundary, * then 'sp' should be word aligned here. If it's * not, then the user is trying to mess with us. */ if (env->regs[13] & 7) goto badframe; frame = (struct rt_sigframe *)env->regs[13]; #if 0 if (verify_area(VERIFY_READ, frame, sizeof (*frame))) goto badframe; #endif target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); sigprocmask(SIG_SETMASK, &host_set, NULL); if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) goto badframe; if (do_sigaltstack(h2g(&frame->uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) goto badframe; #if 0 /* Send SIGTRAP if we're single-stepping */ if (ptrace_cancel_bpt(current)) send_sig(SIGTRAP, current, 1); #endif return env->regs[0]; badframe: force_sig(SIGSEGV /* , current */); return 0; }