Linux Kernel Module Cheat

E.g. src/cpu/decode_cache.hh includes:

which in turn is meant to refer to files of form:

What happens is that the build system creates a file:

which contains just:

and puts that in the -I include path during build.

It appears to be possible to deal with it using preprocessor macros, but it is ugly: https://stackoverflow.com/questions/3178946/using-define-to-include-another-file-in-c-c/3179218#3179218

In addition to the header polymorphism, gem5 also namespaces classes with TheISA::, e.g. in src/cpu/decode_cache.hh:

which is defined at:

as:

and forces already arm/ specific headers to define their symbols under:

so I don’t see the point of this pattern, why not just us PageBytes directly? Looks like a documentation mechanism to indicate that a certain symbol is ISA specific.

Tested in gem5 2a242c5f59a54bc6b8953f82486f7e6fe0aa9b3d.