> As I'm playing with a prototype language and OS while building it on > top of seL4, > I'm not using any intermediate C layers to connect to the seL4 API (so > custom build and > integration and no C runtime), while most of the samples out there are > heavily relying on > some foundations, which is completely understandable, considering how > it can be involving > to build anything relevant on top of the seL4 API. > So as I'm just really getting started to integrate with seL4 (and > I love?? it!) I have to go through > all these details, but I hope that I won't be spamming unnecessarily > here! ?
If you are looking to avoid any C interop or runtime that should be completely possible. The only requirement the kernel makes is that user- level code needs to keep track of the IPC buffer address on its own (unlike previous versions which ensure that a particular register contains the IPC buffer address). If you want a minimal runtime without TLS you could store the IPC buffer address in a global variable and ensure that your system call wrappers use that global variable to load and store data into the IPC buffer.
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