Advanced ELF parsing

[TCCQ]

We need to be able to parse at a minimum non-relocatable executable ELF files, and ideally relocatable ones too.

• Read/parse ELF header into kernel internal struct
• Generate process page table from internal struct
• Hook into file system to avoid compile time inclusions (See File System #45)

The main resource is osdev here, and the initial tests without a filesystem can be done by including an ELF compiled seperately as a binary blob during linking. This not scalable at all, and should really only be for debugging and testing to prevent a hard dependency on #45 in the short term.

[TCCQ]

The current version works for statically linked ELFs that are placed manually to avoid kernel / zero page collisions. See example src/programs/spin/

[TCCQ]

This will now track optional ELF parsing such as relocatable binaries and linking with system libraries (don't count on that happening any time soon).