# lifting-bits/remill

Library for lifting machine code to LLVM bitcode

Repository: https://github.com/lifting-bits/remill
Canonical: https://ross.abutalabs.com/products/remill
Language: C++
License: Apache-2.0
License Family: permissive
Topics: x86, x86-64, aarch64, llvm, llvm-ir, instruction-semantics, armv7, armv8, thumb2, sparcv8, sparcv9
Last push: 2026-07-01T13:41:55+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 90, release rhythm 56, longevity 100
- inputs: {"age_days": 3968, "days_push": 63, "days_rel": 134, "gap_med": 165, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1808, forks 187 (observed 2026-08-28T04:05:39.339192+00:00)

## What it is
Remill is a C++ library that statically translates machine code instructions (x86, amd64, AArch64, SPARC32/64) into LLVM bitcode. It is designed as a building block for other binary lifting tools such as McSema.

## Use cases
- lift machine code to llvm bitcode
- translate x86 binaries to llvm ir
- analyze instruction semantics of arm binaries
- build a binary translator tool
- decompile native code into llvm for analysis
- lift aarch64 instructions for program analysis

## When to choose
- you need accurate per-instruction lifting of machine code into LLVM bitcode
- you are building binary analysis or translation tools like McSema
- you need support for x86/AVX512, AArch64, or SPARC instruction semantics

## When to avoid
- you want a ready-to-use decompiler with a UI rather than a library
- you need dynamic translation or emulation rather than static lifting
- you need full AArch32/ARMv7 support today, which is still underway

## Facets
- artifact type: library
- maturity: active
- function: compiler, parser, interpreter
- domain: compilers, security, reverse-engineering, developer-tools
- platform: cpp, cli
- tags: binary-lifting, llvm-bitcode, instruction-semantics, binary-translation, x86, aarch64, sparc, static-analysis, linux, macos

## Member repositories
- lifting-bits/remill (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:39.339192+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:21:23.036306+00:00, confidence not recorded.
  - readme: https://github.com/lifting-bits/remill (fetched 2026-08-28T04:05:39.339192+00:00, sha ac64bdf2b246)
- Data as of 2026-08-30T08:39:29.467469+00:00.