static void setup_rt_frame(int sig, struct target_sigaction *ka, target_siginfo_t *info, target_sigset_t *set, CPUPPCState *env) { struct target_rt_sigframe *rt_sf; struct target_mcontext *frame; target_ulong rt_sf_addr, newsp = 0; int i, err = 0; int signal; rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf)); if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) goto sigsegv; signal = current_exec_domain_sig(sig); copy_siginfo_to_user(&rt_sf->info, info); __put_user(0, &rt_sf->uc.tuc_flags); __put_user(0, &rt_sf->uc.tuc_link); __put_user((target_ulong)target_sigaltstack_used.ss_sp, &rt_sf->uc.tuc_stack.ss_sp); __put_user(sas_ss_flags(env->gpr[1]), &rt_sf->uc.tuc_stack.ss_flags); __put_user(target_sigaltstack_used.ss_size, &rt_sf->uc.tuc_stack.ss_size); __put_user(h2g (&rt_sf->uc.tuc_mcontext), &rt_sf->uc.tuc_regs); for(i = 0; i < TARGET_NSIG_WORDS; i++) { __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]); } frame = &rt_sf->uc.tuc_mcontext; err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); /* The kernel checks for the presence of a VDSO here. We don't emulate a vdso, so use a sigreturn system call. */ env->lr = (target_ulong) h2g(frame->tramp); /* Turn off all fp exceptions. */ env->fpscr = 0; /* Create a stack frame for the caller of the handler. */ newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16); __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); if (err) goto sigsegv; /* Set up registers for signal handler. */ env->gpr[1] = newsp; env->gpr[3] = (target_ulong) signal; env->gpr[4] = (target_ulong) h2g(&rt_sf->info); env->gpr[5] = (target_ulong) h2g(&rt_sf->uc); env->gpr[6] = (target_ulong) h2g(rt_sf); env->nip = (target_ulong) ka->_sa_handler; /* Signal handlers are entered in big-endian mode. */ env->msr &= ~MSR_LE; unlock_user_struct(rt_sf, rt_sf_addr, 1); return; sigsegv: unlock_user_struct(rt_sf, rt_sf_addr, 1); qemu_log("segfaulting from setup_rt_frame\n"); force_sig(TARGET_SIGSEGV); }