Vector35 / Vector35/binaryninja-api

Variadic functions called without parameters in thunks

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Component: Core Effort: Low Impact: Medium
Dominant language
C++
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Description

Version and Platform (required):

  • Binary Ninja Version: 4.3.6539-dev, f984e126
  • OS: macos
  • OS Version: 15.1
  • CPU Architecture: arm64

Bug Description:

int32_t _open(char const*, int32_t, ...):

int32_t _printf(char const*, ...):

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Research direction

Reproduce the reported behavior using the provided variadic _open and _printf signatures on the listed Binary Ninja version and macOS arm64 environment. Trace how thunks represent calls without parameters and compare the decompiler output with the function declarations; done means the variadic arguments are represented correctly.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
reverse-engineering
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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