Armv7: sha1* instructions fail to disassemble

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Assessment

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

Research direction

Reproduce the failure with the ARM bytes and cstool commands shown in the issue, comparing them with objdump's sha1h.32 output. Trace the ARM disassembly entry point for these SHA-1 instructions; done means the reported encodings disassemble successfully with the expected instruction and operands.

Written by the indexing model from the issue text.

Description

Arch: ARM/Thumb Component: Architecture Effort: Low Impact: Low

afbeelding

objdump:
72f10: f3b962c0 sha1h.32 q3, q0

Capstone also fails to disassemble it:

cstool -d arm C062B9F3
ERROR: invalid assembly code
cstool -d arm F3B962C0
ERROR: invalid assembly code

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