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These Haskell bindings make large use of c2hs to generate much of the code, so Unicorn's const_generator is not used. The emulator is based on the Either monad transformer. The IO monad is used to run the underlying Unicorn library, while the Either monad is used to handle errors. Instructions on how to build the bindings are located in bindings/haskell/README.TXT. The same samples found in samples/ can be found in bindings/haskell/samples. They should produce the same output, with slight differences in their error handling and messaging.
134 lines
3.9 KiB
Haskell
134 lines
3.9 KiB
Haskell
-- Sample code to demonstrate how to emulate ARM code
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import Unicorn
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import Unicorn.Hook
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import qualified Unicorn.CPU.Arm as Arm
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import qualified Data.ByteString as BS
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import Data.Word
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import qualified Numeric as N (showHex)
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-- Code to be emulated
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--
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-- mov r0, #0x37; sub r1, r2, r3
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armCode :: BS.ByteString
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armCode = BS.pack [0x37, 0x00, 0xa0, 0xe3, 0x03, 0x10, 0x42, 0xe0]
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-- sub sp, #0xc
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thumbCode :: BS.ByteString
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thumbCode = BS.pack [0x83, 0xb0]
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-- Memory address where emulation starts
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address :: Word64
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address = 0x10000
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-- Pretty-print integral as hex
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showHex :: (Integral a, Show a) => a -> String
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showHex =
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flip N.showHex ""
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-- Calculate code length
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codeLength :: Num a => BS.ByteString -> a
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codeLength =
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fromIntegral . BS.length
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hookBlock :: BlockHook ()
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hookBlock _ addr size _ =
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putStrLn $ ">>> Tracing basic block at 0x" ++ showHex addr ++
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", block size = 0x" ++ (maybe "0" showHex size)
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hookCode :: CodeHook ()
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hookCode _ addr size _ =
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putStrLn $ ">>> Tracing instruction at 0x" ++ showHex addr ++
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", instruction size = 0x" ++ (maybe "0" showHex size)
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testArm :: IO ()
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testArm = do
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putStrLn "Emulate ARM code"
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result <- runEmulator $ do
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-- Initialize emulator in ARM mode
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uc <- open ArchArm [ModeArm]
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-- Map 2MB memory for this emulation
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memMap uc address (2 * 1024 * 1024) [ProtAll]
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-- Write machine code to be emulated to memory
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memWrite uc address armCode
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-- Initialize machine registers
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regWrite uc Arm.R0 0x1234
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regWrite uc Arm.R2 0x6789
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regWrite uc Arm.R3 0x3333
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-- Tracing all basic blocks with customized callback
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blockHookAdd uc hookBlock () 1 0
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-- Tracing one instruction at address with customized callback
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codeHookAdd uc hookCode () address address
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-- Emulate machine code in infinite time (last param = Nothing), or
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-- when finishing all the code
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let codeLen = codeLength armCode
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start uc address (address + codeLen) Nothing Nothing
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-- Return the results
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r0 <- regRead uc Arm.R0
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r1 <- regRead uc Arm.R1
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return (r0, r1)
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case result of
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Right (r0, r1) -> do
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-- Now print out some registers
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putStrLn ">>> Emulation done. Below is the CPU context"
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putStrLn $ ">>> R0 = 0x" ++ showHex r0
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putStrLn $ ">>> R1 = 0x" ++ showHex r1
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Left err -> putStrLn $ "Failed with error: " ++ show err ++ " (" ++
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strerror err ++ ")"
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testThumb :: IO ()
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testThumb = do
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putStrLn "Emulate THUMB code"
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result <- runEmulator $ do
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-- Initialize emulator in ARM mode
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uc <- open ArchArm [ModeThumb]
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-- Map 2MB memory for this emulation
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memMap uc address (2 * 1024 * 1024) [ProtAll]
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-- Write machine code to be emulated to memory
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memWrite uc address thumbCode
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-- Initialize machine registers
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regWrite uc Arm.Sp 0x1234
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-- Tracing all basic blocks with customized callback
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blockHookAdd uc hookBlock () 1 0
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-- Tracing one instruction at address with customized callback
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codeHookAdd uc hookCode () address address
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-- Emulate machine code in infinite time (last param = Nothing), or
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-- when finishing all the code
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let codeLen = codeLength thumbCode
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start uc address (address + codeLen) Nothing Nothing
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-- Return the results
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sp <- regRead uc Arm.Sp
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return sp
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case result of
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Right sp -> do
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-- Now print out some registers
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putStrLn ">>> Emulation done. Below is the CPU context"
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putStrLn $ ">>> SP = 0x" ++ showHex sp
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Left err -> putStrLn $ "Failed with error: " ++ show err ++ " (" ++
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strerror err ++ ")"
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main :: IO ()
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main = do
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testArm
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putStrLn "=========================="
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testThumb
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