2020-01-02 00:35:02 +00:00
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# Initialize the minimal runtime for Mu programs.
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#
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2021-03-04 08:11:23 +00:00
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# See translate for how this file is used.
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2020-01-02 00:35:02 +00:00
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#
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2021-03-27 05:47:44 +00:00
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# Mu programs start at a function called 'main' with this signature:
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2021-03-28 00:47:23 +00:00
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# fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk)
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2021-03-27 05:47:44 +00:00
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#
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2021-03-04 08:11:23 +00:00
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# All tests must pass first (the "power-on unit test").
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2020-01-02 00:35:02 +00:00
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== code
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2021-03-16 03:39:23 +00:00
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Entry:
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2021-03-16 03:39:36 +00:00
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# initialize stack
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bd/copy-to-ebp 0/imm32
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2021-05-04 03:39:49 +00:00
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#
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2021-04-19 06:26:38 +00:00
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#? (main 0 0 Primary-bus-secondary-drive)
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2021-06-23 06:39:54 +00:00
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# always first run tests
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(run-tests)
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(num-test-failures) # => eax
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# call main if tests all passed
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{
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3d/compare-eax-and 0/imm32
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75/jump-if-!= break/disp8
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c7 0/subop/copy *Running-tests? 0/imm32/false
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(clear-real-screen)
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c7 0/subop/copy *Real-screen-cursor-x 0/imm32
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c7 0/subop/copy *Real-screen-cursor-y 0/imm32
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(main 0 0 Primary-bus-secondary-drive)
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}
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7842 - new directory organization
Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.
So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.
A couple of things have gotten dropped in this process:
- I had old ways to run on just a Linux kernel, or with a Soso kernel.
No more.
- I had some old tooling for running a single test at the cursor. I haven't
used that lately. Maybe I'll bring it back one day.
The reorg isn't done yet. Still to do:
- redo documentation everywhere. All the README files, all other markdown,
particularly vocabulary.md.
- clean up how-to-run comments at the start of programs everywhere
- rethink what to do with the html/ directory. Do we even want to keep
supporting it?
In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.
2021-03-04 06:09:50 +00:00
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2021-03-16 03:39:36 +00:00
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# hang indefinitely
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{
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eb/jump loop/disp8
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}
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