long do_rt_sigreturn(CPUM68KState *env) { struct target_rt_sigframe *frame; abi_ulong frame_addr = env->aregs[7] - 4; target_sigset_t target_set; sigset_t set; trace_user_do_rt_sigreturn(env, frame_addr); if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) goto badframe; target_to_host_sigset_internal(&set, &target_set); set_sigmask(&set); /* restore registers */ if (target_rt_restore_ucontext(env, &frame->uc)) goto badframe; if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) goto badframe; unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; badframe: unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV); return 0; }