Expand long opcode option corrupts align of instructions

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#3,711 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
cpp
Domain
reverse-engineering

Research direction

Reproduce the issue in Binary Ninja 3.2.3895-dev on Windows 11 x64 using the screenshots as the comparison, toggling “Expand long opcode.” Trace the disassembly instruction-layout or alignment path reached by that option. Done means instruction alignment remains correct when the option is enabled, including in more complex examples.

Written by the indexing model from the issue text.

Description

Component: UI Effort: Trivial Impact: Low
  • Binary Ninja Version: 3.2.3895-dev
  • OS: Windows 11, x64

Bug Description:
Expand long opcode option corrupts aligin of instructions. In the example below it may not be too annoying, but in more complex examples it can be quite annoying.

Screenshots:
"Expand long opcode" disabled:
good

"Expand long opcode" enabled:
bad

Dominant language
C++
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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