A computer program product for facilitating processing within a computing environment, the computer program product comprising: a computer readable storage medium readable by a processing circuit and storing instructions for performing a method comprising: performing an initial program load of an application of the computing environment, the performing the initial program load of the application comprising: determining whether one or more signatures of one or more signed binary code components to be used to initial program load the application are verified; and performing additional verification for the initial program load of the application, if the one or more signatures are verified, the performing additional verification comprising: obtaining a binary code component of one or more binary code components to be used to initial program load the application; determining whether the binary code component is a particular signed binary code component from among the one or more binary code components; performing a check if the binary code component is the particular signed binary code component, wherein the performing the check uses guard code of the particular signed binary code component that checks whether a pointer in a program status word points to the particular signed binary code component and sets a valid indicator to a selected value if the pointer points to the particular signed binary code component; and continuing with performing the initial program load of the application based on a successful check, the continuing with performing the initial program load of the application includes using the valid indicator in processing of one or more other binary code components, if there are one or more other binary code components to be processed. determining whether one or more signatures of one or more signed binary code components to be used to initial program load the application are verified; and performing additional verification for the initial program load of the application, if the one or more signatures are verified, the performing additional verification comprising: obtaining a binary code component of one or more binary code components to be used to initial program load the application; determining whether the binary code component is a particular signed binary code component from among the one or more binary code components; performing a check if the binary code component is the particular signed binary code component, wherein the performing the check uses guard code of the particular signed binary code component that checks whether a pointer in a program status word points to the particular signed binary code component and sets a valid indicator to a selected value if the pointer points to the particular signed binary code component; and continuing with performing the initial program load of the application based on a successful check, the continuing with performing the initial program load of the application includes using the valid indicator in processing of one or more other binary code components, if there are one or more other binary code components to be processed. obtaining a binary code component of one or more binary code components to be used to initial program load the application; determining whether the binary code component is a particular signed binary code component from among the one or more binary code components; performing a check if the binary code component is the particular signed binary code component, wherein the performing the check uses guard code of the particular signed binary code component that checks whether a pointer in a program status word points to the particular signed binary code component and sets a valid indicator to a selected value if the pointer points to the particular signed binary code component; and continuing with performing the initial program load of the application based on a successful check, the continuing with performing the initial program load of the application includes using the valid indicator in processing of one or more other binary code components, if there are one or more other binary code components to be processed.