| Commit message (Collapse) | Author | Age | Files | Lines |
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ex4 now writes to the (global) data segment, rather than trying to write
to the code segment.
We still need to specify the other segments in the generated ELF,
though.
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Drop a safety net; we now assume that Memory is large enough for any
addresses we may encounter.
Dropping all comparisons with Mem.size() now makes our Memory_offset
indirection airtight.
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Insert an indirection to avoid over-allocating memory for RAM.
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Encapsulate RAM management.
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Currently only runs in emulated mode. Likely a paging issue, writing
data to code page. I'm not checking the return value.
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Result has to be small enough to fit in AL so exit() can return it.
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Modify helpers to run either external examples in the subx/teensy/
directory, or my own examples in subx/ directory.
Now I have to say `run test5` instead of `run 5`, and so on.
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Fix a few more typos in example programs.
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Simpler.
Now it's clear that what commit 4291 got wrong was an
alignment-violating address for both the entrypoint and the start of the
segment.
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Second attempt at commit 4291. We'll now not copy the headers into
memory, but we'll still allocate space for them. Still some security
benefits, and I'm gaining confidence that I understand the ELF format.
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I'm getting sick of hitting the <Tab> key.
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Learning to use the data segment.
Currently, subx can only run the teensy files generated from flat
assembler:
test4
test5
test7
This is not a priority to fix. These files are just useful references to
have around.
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Temporarily do all prints in hex.
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Simplify a couple of test programs.
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Undo 4291; turns out the generated ELF binary was no longer running
natively on 32-bit Linux. Even with p_align set to 0.
Agh, not worth my time.
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Undo 4306.
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Doesn't compile.
I'm still not sure how to represent types and global variables.
Types won't be in the final binary.
But globals will. Perhaps I should first figure out what that looks like.
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We'll see if this is useful. Mostly just stretching our legs.
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Starting to work out the skeleton every phase needs to have.
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All tests continue to pass after a trivial translation phase.
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As we add high-level constructs we'll start labeling low-level
constructs as unsafe, and highlighting them in red in our editor.
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No need for it once the program's loaded. And we keep programs from
running the header as code.
This also simplifies the header computation in the translator.
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Clarify a few happy accidents.
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The source 'language' is still entirely open. We'll see how it evolves
as I write programs in machine code.
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Give subx too the recent support for running a single test.
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Fix CI. Looks like 'std::' sometimes doesn't work.
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Make prints uniform.
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Hopefully I won't need much more than exit, read and write.
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We're now parsing the ELF spec more closely and better handling multiple
program header table entries.
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