static long do_rt_sigreturn_v1(CPUARMState *env) { abi_ulong frame_addr; struct rt_sigframe_v1 *frame = NULL; sigset_t host_set; /* * 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_rt_sigreturn(env, frame_addr); if (frame_addr & 7) { goto badframe; } if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { goto badframe; } target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); set_sigmask(&host_set); if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { goto badframe; } if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 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 -TARGET_QEMU_ESIGRETURN; badframe: unlock_user_struct(frame, frame_addr, 0); force_sig(TARGET_SIGSEGV /* , current */); return 0; }
static long do_rt_sigreturn_v1(CPUARMState *env) { abi_ulong frame_addr; struct rt_sigframe_v1 *frame = NULL; sigset_t host_set;   frame_addr = env->regs[13]; trace_user_do_rt_sigreturn(env, frame_addr); if (frame_addr & 7) { goto badframe; } if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { goto badframe; } target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); set_sigmask(&host_set); if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { goto badframe; } if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) goto badframe; #if 0   if (ptrace_cancel_bpt(current)) send_sig(SIGTRAP, current, 1); #endif 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; }