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* 5404 - subx/examples/ex1 now translatingKartik Agaram2019-07-154-10/+47
| | | | | | | | | | | | | | | | | | | The result isn't an identical binary to before, and it segfaults when run. But it's bugfix seven. A couple of places where we make .subx files a little more strict: a) All .subx files must define a data segment. Even if they have no data. b) All .subx files must define an `Entry` label for the binary to start at. Earlier we used to default to the start of the code label. That's not too hard to add; we'd just need to: i) rename `get` to `get-or-abort` ii) clone a third variant of `get-or-insert` called `get` that returns null if the key is not found. iii) use `get` rather than `get-or-abort` when looking up the `Entry` label.
* 5403Kartik Agaram2019-07-141-3/+3
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* update roadmap in subx/ReadmeKartik Agaram2019-07-141-7/+1
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* .Kartik Agaram2019-07-1467-20762/+26544
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* .Kartik Agaram2019-07-131-1/+0
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* Merge pull request #34 from akkartik/surveyKartik Agaram2019-07-1353-2704/+9228
|\ | | | | SubX in SubX: computing addresses for labels
| * .Kartik Agaram2019-07-132-132/+132
| | | | | | | | Clean up.
| * add subx/apps/survey to CIKartik Agaram2019-07-131-0/+10
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| * .Kartik Agaram2019-07-133-0/+0
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| * survey.subx now passing all testsKartik Agaram2019-07-132-8/+34
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| * grow the output stream; test now completesKartik Agaram2019-07-131-2/+18
| | | | | | | | All assertions in `test-convert-computes-addresses` still failing.
| * `test-convert-computes-addresses` bugfix sixKartik Agaram2019-07-132-72/+135
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | map of how far we've gotten by now (functions with '*' independently tested): ✓ compute-offsets* ✓ compute-addresses* ✓ emit-output ✓ emit-headers ✓ emit-elf-header ✓ emit-hex-array* ✓ first emit-elf-program-header-entry ✓ emit-hex-array* ? second emit-elf-program-header-entry emit-hex-array* emit-segments*
| * .Kartik Agaram2019-07-133-0/+0
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| * fixed fifth bug, hit sixthKartik Agaram2019-07-132-5/+6
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| * .Kartik Agaram2019-07-132-170/+0
| | | | | | | | Clean up.
| * fixed fourth bug, hit fifthKartik Agaram2019-07-132-50/+289
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| * fixed third bug, hit fourthKartik Agaram2019-07-131-1/+1
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| * .Kartik Agaram2019-07-132-190/+0
| | | | | | | | Clean up.
| * fixed second bug, hit thirdKartik Agaram2019-07-133-6/+293
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| * .Kartik Agaram2019-07-133-41/+39
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| * fixed one bug, hit anotherKartik Agaram2019-07-122-58/+87
| | | | | | | | | | | | | | | | | | | | I carefully logged the segment a label is declared in but forgot to actually save it in the table. This has been a theoretic concern for some time, but I've never seen it actually happen until now. SubX is just too low level. Now I get past the first two phases but code generation fails to find the 'Entry' label.
| * .Kartik Agaram2019-07-122-2/+70
| | | | | | | | | | | | | | | | Snapshot at a random moment, showing a new debugging trick: hacking on the C++ level to dump memory contents on specific labels. For some reason label 'x' doesn't have a segment assigned by the time we get to compute-addresses.
| * .Kartik Agaram2019-07-122-4/+44
| | | | | | | | | | | | | | Continuation of commit 6f6d458fcd to support unsigned comparisons in 32-bit jumps. Once again, no tests.
| * .Kartik Agaram2019-07-121-6/+6
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| * .Kartik Agaram2019-07-121-25/+25
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| * compute-offsets test now passingKartik Agaram2019-07-122-49/+97
| | | | | | | | The final integration test-convert-computes-addresses is still failing.
| * the pseudocode is pretty long, so add an outlineKartik Agaram2019-07-121-2/+11
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| * rearrange compute-offsets casesKartik Agaram2019-07-121-73/+74
| | | | | | | | | | Now they're in the order you expect to see them at runtime: first you see a segment header, then you see labels.
| * .Kartik Agaram2019-07-121-26/+26
| | | | | | | | move trace dump to before checks
| * .Kartik Agaram2019-07-111-1/+0
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| * one failure remaining in test-compute-offsetsKartik Agaram2019-07-112-123/+291
| | | | | | | | | | | | | | | | | | 'curr-segment-name' is now a string, and it's stored in a register rather than a global. Paradoxically, this leaks *less* than before. Before, every call to `get-or-insert-slice` leaked memory. Now we leak one string for every new segment. Which is trivial.
| * .Kartik Agaram2019-07-111-12/+12
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| * .Kartik Agaram2019-07-111-7/+5
| | | | | | | | | | Pseudocode is a little more truthful now about what variables are on the stack.
| * the problem: curr-segment-name is staleKartik Agaram2019-07-111-3/+126
| | | | | | | | | | | | | | It's a slice into the 'line' stream. But we want to preserve the current segment name across lines. Let's leak some memory.
| * .Kartik Agaram2019-07-111-14/+14
| | | | | | | | Make the trace a little more consistent.
| * label offset computation still has a bugKartik Agaram2019-07-111-6/+7
| | | | | | | | | | | | I changed the test a little to make it obvious. Basically there's no way we can compute the segment offset correctly without knowing the segment name in the previous assertion.
| * revert compute-offsets to segment-relative offsetsKartik Agaram2019-07-111-7/+7
| | | | | | | | | | | | | | | | The pseudocode was a mess here :/ I was saving the segment-offset but tracing the file-offset. Segments need file offsets (to tweak their starting address). Labels need segment offsets (to add to segment starting address).
| * .Kartik Agaram2019-07-111-2/+3
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| * move discard instruction to correct spotnc2019-07-111-2/+2
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| * updated test so 'x' is relative to file-offset not segment offsetnc2019-07-111-3/+3
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| * made test 2 passnc2019-07-111-9/+11
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| * .Kartik Agaram2019-07-102-3/+7
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| * .Kartik Agaram2019-07-101-7/+7
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| * .Kartik Agaram2019-07-101-0/+2
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| * .Kartik Agaram2019-07-102-2/+2
| | | | | | | | I think we're calling the wrong variant here.
| * start distinguishing table lookups from insertsKartik Agaram2019-07-106-12/+382
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| * zero out new rows returned by get-or-insertKartik Agaram2019-07-1011-0/+103
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| * finally tracked down binary character in tracesKartik Agaram2019-07-101-1/+1
| | | | | | | | This was why grep required the `-a` argument in vimrc.vim.
| * .Kartik Agaram2019-07-107-5/+5
| | | | | | | | | | Another batch of incorrectly signed conditional jumps. (Follow-up to commit 5180.)
| * .Kartik Agaram2019-07-102-1/+1
| | | | | | | | Fix infinite loop in the 2 remaining failing tests; now it's a segfault.
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