Vector35 / Vector35/binaryninja-api
[x86] [sysv] returned structures more than register width should be passed in rdi
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Core: Calling Convention
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- C++
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Description
Struct `Class::method`(class Class* `this`)
where sizeof(Struct) > REG_SIZE must be handled as
void `Class::method`(Struct& ret, class Class* `this`)
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the x86 SysV ABI handling for returned structures and trace how the method signature is represented. Compare the behavior for structures at and above register width, then verify that oversized returns are represented with the return reference in rdi before this; done means the displayed signature matches the requested form.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers, reverse-engineering
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 50/100