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; int d0; if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) goto badframe; target_to_host_sigset_internal(&set, &target_set); sigprocmask(SIG_SETMASK, &set, NULL); /* restore registers */ if (target_rt_restore_ucontext(env, &frame->uc, &d0)) 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 d0; badframe: unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV); return 0; }