add more information in README
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README.md
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README.md
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@ -13,13 +13,32 @@ aarch64. Install the following:
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* [Kraftkit](https://unikraft.org/docs/cli/install)
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* [Kraftkit](https://unikraft.org/docs/cli/install)
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Then run `zig build run` and everything will compile and run. The zig source
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Then run `zig build run` and everything will compile and run. The zig source
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code is all in the `ziggy` directory
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code is all in the `ziggy` directory. This is all prototype level code at this
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point.
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undefined.c
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-----------
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This file aims to fill in all the undefined symbols that are referenced when
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a zig project links libC (necessary for unikraft kernel development). However,
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this is very incomplete. The `.config.hellowworld_qemu-x86_64` file, usually
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managed by the invocation of the TUI started by `kraft menu`, will add/remove
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features that result in various libc symbols being implemented. A few
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`#ifdef` statements exist currently, but even the few that are in there aren't
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quite right...this file is mostly a "hack around until it works" effort.
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Knowing that this is an initial effort, care was put into making sure that
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when a symbol is actually **used** at runtime, the unikernel will crash after
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posting a message indicating the specific function call that was involved. This
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is designed to either a) correct the configuration using `kraft menu` or
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b) provide an implementation directly in `undefined.c`. In some cases, I prefer
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the implementation in `undefined.c`, most specifically the `write` function,
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which will output stderr messages in red.
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Notes
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Notes
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-----
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-----
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The build script basically runs these commands:
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The build script basically runs these commands:
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```sh
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```sh
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