static void setup_rt_frame(int sig, struct emulated_sigaction *ka, target_siginfo_t *info, target_sigset_t *set, CPUX86State *env) { struct rt_sigframe *frame; int err = 0; frame = get_sigframe(ka, env, sizeof(*frame)); #if 0 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) goto give_sigsegv; #endif err |= __put_user((/*current->exec_domain && current->exec_domain->signal_invmap && sig < 32 ? current->exec_domain->signal_invmap[sig] : */sig), &frame->sig); err |= __put_user((target_ulong)&frame->info, &frame->pinfo); err |= __put_user((target_ulong)&frame->uc, &frame->puc); err |= copy_siginfo_to_user(&frame->info, info); if (err) goto give_sigsegv; /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(0, &frame->uc.uc_link); err |= __put_user(/*current->sas_ss_sp*/ 0, &frame->uc.uc_stack.ss_sp); err |= __put_user(/* sas_ss_flags(regs->esp) */ 0, &frame->uc.uc_stack.ss_flags); err |= __put_user(/* current->sas_ss_size */ 0, &frame->uc.uc_stack.ss_size); err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate, env, set->sig[0]); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) goto give_sigsegv; /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa.sa_flags & TARGET_SA_RESTORER) { err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); } else { err |= __put_user(frame->retcode, &frame->pretcode); /* This is movl $,%eax ; int $0x80 */ err |= __put_user(0xb8, (char *)(frame->retcode+0)); err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); err |= __put_user(0x80cd, (short *)(frame->retcode+5)); } if (err) goto give_sigsegv; /* Set up registers for signal handler */ env->regs[R_ESP] = (unsigned long) frame; env->eip = (unsigned long) ka->sa._sa_handler; cpu_x86_load_seg(env, R_DS, __USER_DS); cpu_x86_load_seg(env, R_ES, __USER_DS); cpu_x86_load_seg(env, R_SS, __USER_DS); cpu_x86_load_seg(env, R_CS, __USER_CS); env->eflags &= ~TF_MASK; return; give_sigsegv: if (sig == TARGET_SIGSEGV) ka->sa._sa_handler = TARGET_SIG_DFL; force_sig(TARGET_SIGSEGV /* , current */); }