static long do_sigreturn_v1(CPUARMState *env) { abi_ulong frame_addr; struct sigframe_v1 *frame = NULL; target_sigset_t set; sigset_t host_set; int i; /* * 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. */ frame_addr = env->regs[13]; trace_user_do_sigreturn(env, frame_addr); if (frame_addr & 7) { goto badframe; } if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { goto badframe; } __get_user(set.sig[0], &frame->sc.oldmask); for(i = 1; i < TARGET_NSIG_WORDS; i++) { __get_user(set.sig[i], &frame->extramask[i - 1]); } target_to_host_sigset_internal(&host_set, &set); do_sigprocmask(SIG_SETMASK, &host_set, NULL); if (restore_sigcontext(env, &frame->sc)) { goto badframe; } #if 0 /* Send SIGTRAP if we're single-stepping */ if (ptrace_cancel_bpt(current)) send_sig(SIGTRAP, current, 1); #endif unlock_user_struct(frame, frame_addr, 0); return env->regs[0]; badframe: force_sig(TARGET_SIGSEGV /* , current */); return 0; }