1. A method for providing first-failure data capture functionality during initialization of multiple lockstep processors, the method comprising: receiving, after a hardware reset of two lockstep processors, an indication of one or more crosscheck errors regarding operation of the two lockstep processors; in response to the one or more crosscheck errors: saving crosscheck first-failure data capture (FFDC) data to one or more memory areas that are persistent across a hardware reset; and determining whether a predefined reset threshold has been satisfied; responsive to determining that the predefined reset threshold has been satisfied, analyzing the crosscheck FFDC data from the one or more persistent memory areas and, based on the analyzing of the crosscheck FFDC data, generating one or more crosscheck initialization codes; and initiating an additional hardware reset.