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Support for inline assembler & goto instructions in inline assembler #1326

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@WernerDrasche WernerDrasche commented Jan 11, 2024

Depends on goblint/cil#161.


The tests with annotations will come in very few days.
We are sorry for this (right now still) unpolished state.

Changes in goblint-cil:

  • asm is now statement
  • goto asm is parsed

Changes in analyzer: all changes are switched off by default and can be turned on by --disable asm_is_nop

  • CFG now has edges to labels referenced in goto asm label list
  • base emits new Invalidate {lvals} event (with the lvals of the out-clobbers)
  • We tried to the best of our abilities to handle this event and/or add asm transfer functions in the analyses where necessary

Simon Tietz and others added 30 commits November 17, 2023 17:09
Warns upon longjump to invalid Jumpbuf
@@ -724,7 +724,7 @@ struct
Array (CArrays.set ask n (array_idx_top) v)
| t , Blob n -> Blob (Blobs.invalidate_value ask t n)
| _ , Thread tid -> Thread (Threads.join (Threads.top ()) tid)
| _ , JmpBuf _ -> state (* TODO: no top jmpbuf *)
| _ , JmpBuf (b, c, _) -> JmpBuf(b, c, true)
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The comment should probably still remain, as we normally would have to do more here but just haven't gotten around to it yet.

@@ -73,6 +75,17 @@ struct
ctx.local
end

let asm ctx outs ins =
if not !ignore_asm then begin
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Should the asm_is_top flag impact all analyses? If this check be moved into the mCP, so that it only needs to be done once?

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I think it probably should be at the FromSpec level even. And the top-level asm_is_nop option should probably be replaced with something more organized like sem.asm.nop.

@sim642 sim642 mentioned this pull request Feb 15, 2024
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5 participants