CPunch/LuaDecompy
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# LuaDecompy # LuaDecompy
An experimental Lua 5.1 bytecode decompiler. An experimental Lua 5.1 dump decompiler (typically dumped using `luac -o <out.luac> <script.lua>`).
## Example usage ## Example usage
```sh ```sh
❯ python main.py example.luac > cat example.lua && luac5.1 -o example.luac example.lua
pp = "pri" .. "nt"
if 2 + 2 == 4 then
_G[pp]("Hello world")
end
> python main.py example.luac
example.luac example.luac
==== [[example.lua's constants]] ==== ==== [[example.lua's constants]] ====
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[ 2] CONCAT : R[0] R[0] R[1] [ 2] CONCAT : R[0] R[0] R[1]
[ 3] SETGLOBAL : R[0] R[0] [ 3] SETGLOBAL : R[0] R[0]
[ 4] EQ : R[0] K[3] K[3] [ 4] EQ : R[0] K[3] K[3]
[ 5] JMP : R[0] R[12] [ 5] JMP : R[0] R[5]
[ 6] GETGLOBAL : R[0] K[4] [ 6] GETGLOBAL : R[0] K[4]
[ 7] GETGLOBAL : R[1] K[0] [ 7] GETGLOBAL : R[1] K[0]
[ 8] GETTABLE : R[0] R[0] R[1] [ 8] GETTABLE : R[0] R[0] R[1]
[ 9] LOADK : R[1] K[5] [ 9] LOADK : R[1] K[5]
[ 10] CALL : R[0] R[2] R[4] [ 10] CALL : R[0] R[2] R[1]
[ 11] GETGLOBAL : R[3] K[4] [ 11] RETURN : R[0] R[1] R[0]
[ 12] GETGLOBAL : R[4] K[0]
[ 13] GETTABLE : R[3] R[3] R[4]
[ 14] MOVE : R[4] R[2] R[0]
[ 15] MOVE : R[5] R[1] R[0]
[ 16] MOVE : R[6] R[0] R[0]
[ 17] CALL : R[3] R[4] R[1]
[ 18] RETURN : R[0] R[1] R[0]
==== [[example.lua's decompiled source]] ==== ==== [[example.lua's decompiled source]] ====
pp = "pri" .. "nt" pp = "pri" .. "nt"
if 4.0 == 4.0 then if 4.0 == 4.0 then
local __unknLocal0, __unknLocal1, __unknLocal2 = _G[pp]("Hello world") _G[pp]("Hello world")
_G[pp](__unknLocal2, __unknLocal1, __unknLocal0)
end end
``` ```