Function ExecuteRET

MdeModulePkg/Universal/EbcDxe/EbcExecute.c:3112–3151

Execute the EBC RET instruction. Instruction syntax: RET @param VmPtr A pointer to a VM context. @retval EFI_SUCCESS The instruction is executed successfully. **/

**/
EFI_STATUS
ExecuteRET (
  IN VM_CONTEXT *VmPtr
  )
{

  EbcDebuggerHookRETStart (VmPtr);

  //
  // If we're at the top of the stack, then simply set the done
  // flag and return
  //
  if (VmPtr->StackRetAddr == (UINT64) VmPtr->Gpr[0]) {
    VmPtr->StopFlags |= STOPFLAG_APP_DONE;
  } else {
    //
    // Pull the return address off the VM app's stack and set the IP
    // to it
    //
    if (!IS_ALIGNED ((UINTN) VmPtr->Gpr[0], sizeof (UINT16))) {
      EbcDebugSignalException (
        EXCEPT_EBC_ALIGNMENT_CHECK,
        EXCEPTION_FLAG_FATAL,
        VmPtr
        );
    }
    //
    // Restore the IP and frame pointer from the stack
    //
    VmPtr->Ip = (VMIP) (UINTN) VmReadMem64 (VmPtr, (UINTN) VmPtr->Gpr[0]);
    VmPtr->Gpr[0] += 8;
    VmPtr->FramePtr = (VOID *) VmReadMemN (VmPtr, (UINTN) VmPtr->Gpr[0]);
    VmPtr->Gpr[0] += 8;
  }


  EbcDebuggerHookRETEnd (VmPtr);

  return EFI_SUCCESS;
}


/**