71e4f38129
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.
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|---|---|---|
| .. | ||
| tools | ||
| 000organization.cc | ||
| 001help.cc | ||
| 002test.cc | ||
| 003trace.cc | ||
| 003trace.cc.filter | ||
| 003trace.cc.rotate | ||
| 003trace.test.cc | ||
| 010vm.cc | ||
| 011run.cc | ||
| 012elf.cc | ||
| 013direct_addressing.cc | ||
| 014indirect_addressing.cc | ||
| 015immediate_addressing.cc | ||
| 016index_addressing.cc | ||
| 017jump_disp8.cc | ||
| 018jump_disp32.cc | ||
| 019functions.cc | ||
| 020byte_addressing.cc | ||
| 021div.cc | ||
| 022float.cc | ||
| 029syscalls.cc | ||
| 030translate.cc | ||
| 031transforms.cc | ||
| 032operands.cc | ||
| 033check_operands.cc | ||
| 034check_operand_bounds.cc | ||
| 035compute_segment_address.cc | ||
| 036labels.cc | ||
| 037global_variables.cc | ||
| 038literal_strings.cc | ||
| 039debug.cc | ||
| 040tests.cc | ||
| README.md | ||
| bootstrap | ||
| build | ||
| build_and_test_until | ||
| clean | ||
| test_layers | ||
README.md
This tool is 2 things:
a) An emulator for SubX, the subset of the 32-bit x86 instruction set used by Mu.
b) A second translator for SubX programs that emits identical binaries to the self-hosting versions in the parent directory.