+{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ForeignFunctionInterface #-}
module Mate.X86CodeGen where
import Data.Binary
+import Data.BinaryState
import Data.Int
import Data.Maybe
import qualified Data.Map as M
+import qualified Data.Set as S
import qualified Data.ByteString.Lazy as B
+import Control.Monad
-import Foreign
+import Foreign hiding (xor)
import Foreign.C.Types
+#ifdef DEFINE
import Text.Printf
+#endif
import qualified JVM.Assembler as J
import JVM.Assembler hiding (Instruction)
import JVM.ClassFile
-import JVM.Converter
import Harpy
import Harpy.X86Disassembler
import Mate.BasicBlocks
+import Mate.Types
import Mate.Utilities
+import Mate.ClassPool
+import Mate.Strings
+
foreign import ccall "dynamic"
code_int :: FunPtr (CInt -> CInt -> IO CInt) -> (CInt -> CInt -> IO CInt)
-foreign import ccall "getaddr"
- getaddr :: CUInt
+foreign import ccall "getMallocAddr"
+ getMallocAddr :: CUInt
foreign import ccall "callertrap"
callertrap :: IO ()
foreign import ccall "register_signal"
register_signal :: IO ()
-foreign import ccall "get_cmap"
- get_cmap :: IO (Ptr ())
-
-foreign import ccall "set_cmap"
- set_cmap :: Ptr () -> IO ()
-
-test_01, test_02, test_03 :: IO ()
-test_01 = do
- register_signal
- (entry, end) <- testCase "./tests/Fib.class" "fib"
- let entryFuncPtr = ((castPtrToFunPtr entry) :: FunPtr (CInt -> CInt -> IO CInt))
-
- mapM_ (\x -> do
- result <- code_int entryFuncPtr x 0
- let iresult :: Int; iresult = fromIntegral result
- let kk :: String; kk = if iresult == (fib x) then "OK" else "FAIL (" ++ (show (fib x)) ++ ")"
- printf "result of fib(%2d): %3d\t\t%s\n" (fromIntegral x :: Int) iresult kk
- ) $ ([0..10] :: [CInt])
- printf "patched disasm:\n"
- Right newdisasm <- disassembleBlock entry end
- mapM_ (putStrLn . showAtt) newdisasm
- where
- fib :: CInt -> Int
- fib n
- | n <= 1 = 1
- | otherwise = (fib (n - 1)) + (fib (n - 2))
-
-
-test_02 = do
- (entry,_) <- testCase "./tests/While.class" "f"
- let entryFuncPtr = ((castPtrToFunPtr entry) :: FunPtr (CInt -> CInt -> IO CInt))
- result <- code_int entryFuncPtr 5 4
- let iresult :: Int; iresult = fromIntegral result
- let kk :: String; kk = if iresult == 15 then "OK" else "FAIL"
- printf "result of f(5,4): %3d\t\t%s\n" iresult kk
-
- result2 <- code_int entryFuncPtr 4 3
- let iresult2 :: Int; iresult2 = fromIntegral result2
- let kk2 :: String; kk2 = if iresult2 == 10 then "OK" else "FAIL"
- printf "result of f(4,3): %3d\t\t%s\n" iresult2 kk2
-
-
-test_03 = do
- (entry,_) <- testCase "./tests/While.class" "g"
- let entryFuncPtr = ((castPtrToFunPtr entry) :: FunPtr (CInt -> CInt -> IO CInt))
- result <- code_int entryFuncPtr 5 4
- let iresult :: Int; iresult = fromIntegral result
- let kk :: String; kk = if iresult == 15 then "OK" else "FAIL"
- printf "result of g(5,4): %3d\t\t%s\n" iresult kk
-
- result2 <- code_int entryFuncPtr 4 3
- let iresult2 :: Int; iresult2 = fromIntegral result2
- let kk2 :: String; kk2 = if iresult2 == 10 then "OK" else "FAIL"
- printf "result of g(4,3): %3d\t\t%s\n" iresult2 kk2
-
-
-testCase :: String -> B.ByteString -> IO (Ptr Word8, Int)
-testCase cf method = do
- cls <- parseClassFile cf
- hmap <- parseMethod cls method
- printMapBB hmap
- case hmap of
- Nothing -> error "sorry, no code generation"
- Just hmap' -> do
- let ebb = emitFromBB cls hmap'
- (_, Right ((entry, bbstarts, end, _), disasm)) <- runCodeGen ebb () ()
- let int_entry = ((fromIntegral $ ptrToIntPtr entry) :: Int)
- printf "disasm:\n"
- mapM_ (putStrLn . showAtt) disasm
- printf "basicblocks addresses:\n"
- let b = map (\(x,y) -> (x,y + int_entry)) $ M.toList bbstarts
- mapM_ (\(x,y) -> printf "\tBasicBlock %2d starts at 0x%08x\n" x y) b
- return (entry, end)
type EntryPoint = Ptr Word8
type EntryPointOffset = Int
type BBStarts = M.Map BlockID Int
-type CompileInfo = (EntryPoint, BBStarts, Int, CMap)
-
--- B.ByteString: encoded name: <Class>.<methodname><signature>
--- Class Resolved: classfile
--- Word16: index of invoke-instruction
-type MethodInfo = (B.ByteString, Class Resolved, Word16)
+type CompileInfo = (EntryPoint, BBStarts, Int, TrapMap)
--- Word32 = point of method call in generated code
--- MethodInfo = relevant information about callee
-type CMap = M.Map Word32 MethodInfo
-
-emitFromBB :: Class Resolved -> MapBB -> CodeGen e s (CompileInfo, [Instruction])
-emitFromBB cls hmap = do
+emitFromBB :: B.ByteString -> Class Resolved -> MapBB -> CodeGen e s (CompileInfo, [Instruction])
+emitFromBB method cls hmap = do
llmap <- sequence [newNamedLabel ("bb_" ++ show x) | (x,_) <- M.toList hmap]
let lmap = zip (Prelude.fst $ unzip $ M.toList hmap) llmap
ep <- getEntryPoint
push ebp
mov ebp esp
+ -- TODO(bernhard): determine a reasonable value.
+ -- e.g. (locals used) * 4
+ sub esp (0x60 :: Word32)
(calls, bbstarts) <- efBB (0,(hmap M.! 0)) M.empty M.empty lmap
d <- disassemble
getLabel _ [] = error "label not found!"
getLabel i ((x,l):xs) = if i==x then l else getLabel i xs
- efBB :: (BlockID, BasicBlock) -> CMap -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (CMap, BBStarts)
+ efBB :: (BlockID, BasicBlock) -> TrapMap -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (TrapMap, BBStarts)
efBB (bid, bb) calls bbstarts lmap =
if M.member bid bbstarts then
return (calls, bbstarts)
-- TODO(bernhard): implement `emit' as function which accepts a list of
-- instructions, so we can use patterns for optimizations
where
- emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, MethodInfo))
- emit' (INVOKESTATIC cpidx) = do
- ep <- getEntryPoint
- let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
+ getCurrentOffset :: CodeGen e s (Word32)
+ getCurrentOffset = do
+ ep <- getEntryPoint
+ let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
+ offset <- getCodeOffset
+ return $ w32_ep + (fromIntegral offset)
+
+ emitInvoke :: Word16 -> Bool -> CodeGen e s (Maybe (Word32, TrapInfo))
+ emitInvoke cpidx hasThis = do
let l = buildMethodID cls cpidx
- calladdr <- getCodeOffset
- let w32_calladdr = w32_ep + (fromIntegral calladdr) :: Word32
- newNamedLabel (toString l) >>= defineLabel
- -- TODO(bernhard): better try SIGILL instead of SIGSEGV?
- mov (Addr 0) eax
- -- discard arguments (TODO(bernhard): don't hardcode it)
- add esp (4 :: Word32)
- -- push result on stack (TODO(bernhard): if any)
+ calladdr <- getCurrentOffset
+ newNamedLabel (show l) >>= defineLabel
+ -- causes SIGILL. in the signal handler we patch it to the acutal call.
+ -- place a nop at the end, therefore the disasm doesn't screw up
+ emit32 (0xffff9090 :: Word32) >> emit8 (0x90 :: Word8)
+ -- discard arguments on stack
+ let argcnt = ((if hasThis then 1 else 0) + (methodGetArgsCount cls cpidx)) * 4
+ when (argcnt > 0) (add esp argcnt)
+ -- push result on stack if method has a return value
+ when (methodHaveReturnValue cls cpidx) (push eax)
+ return $ Just $ (calladdr, MI l)
+
+ emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapInfo))
+ emit' (INVOKESPECIAL cpidx) = emitInvoke cpidx True
+ emit' (INVOKESTATIC cpidx) = emitInvoke cpidx False
+ emit' (INVOKEVIRTUAL cpidx) = do
+ -- get methodInfo entry
+ let mi@(MethodInfo methodname objname msig@(MethodSignature args _)) = buildMethodID cls cpidx
+ newNamedLabel (show mi) >>= defineLabel
+ -- objref lives somewhere on the argument stack
+ mov eax (Disp ((*4) $ fromIntegral $ length args), esp)
+ -- get method-table-ptr
+ mov eax (Disp 0, eax)
+ -- get method offset
+ let nameAndSig = methodname `B.append` (encode msig)
+ offset <- liftIO $ getMethodOffset objname nameAndSig
+ -- make actual (indirect) call
+ calladdr <- getCurrentOffset
+ call (Disp offset, eax)
+ -- discard arguments on stack (+4 for "this")
+ let argcnt = 4 + ((methodGetArgsCount cls cpidx) * 4)
+ when (argcnt > 0) (add esp argcnt)
+ -- push result on stack if method has a return value
+ when (methodHaveReturnValue cls cpidx) (push eax)
+ -- note, the "mi" has the wrong class reference here.
+ -- we figure that out at run-time, in the methodpool,
+ -- depending on the method-table-ptr
+ return $ Just $ (calladdr, VI mi)
+ emit' (PUTSTATIC cpidx) = do
+ pop eax
+ trapaddr <- getCurrentOffset
+ mov (Addr 0x00000000) eax -- it's a trap
+ return $ Just $ (trapaddr, SFI $ buildStaticFieldID cls cpidx)
+ emit' (GETSTATIC cpidx) = do
+ trapaddr <- getCurrentOffset
+ mov eax (Addr 0x00000000) -- it's a trap
push eax
- return $ Just $ (w32_calladdr, (l, cls, cpidx))
+ return $ Just $ (trapaddr, SFI $ buildStaticFieldID cls cpidx)
emit' insn = emit insn >> return Nothing
emit :: J.Instruction -> CodeGen e s ()
- emit POP = do -- print dropped value
- ep <- getEntryPoint
- let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
- -- '5' is the size of the `call' instruction ( + immediate)
- calladdr <- getCodeOffset
- let w32_calladdr = 5 + w32_ep + (fromIntegral calladdr) :: Word32
- let trapaddr = (fromIntegral getaddr :: Word32)
- call (trapaddr - w32_calladdr)
+ emit POP = do -- dropp value
add esp (4 :: Word32)
+ emit DUP = push (Disp 0, esp)
+ emit AASTORE = emit IASTORE
+ emit IASTORE = do
+ pop eax -- value
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ mov (ecx, ebx, S4) eax
+ emit AALOAD = emit IALOAD
+ emit IALOAD = do
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ push (ecx, ebx, S4)
+ emit ARRAYLENGTH = do
+ pop eax
+ push (Disp 0, eax)
+ emit (ANEWARRAY _) = emit (NEWARRAY 10) -- 10 == T_INT
+ emit (NEWARRAY typ) = do
+ let tsize = case decodeS (0 :: Integer) (B.pack [typ]) of
+ T_INT -> 4
+ _ -> error $ "newarray: type not implemented yet"
+ -- get length from stack, but leave it there
+ mov eax (Disp 0, esp)
+ mov ebx (tsize :: Word32)
+ -- multiple amount with native size of one element
+ mul ebx -- result is in eax
+ add eax (4 :: Word32) -- for "length" entry
+ -- push amount of bytes to allocate
+ push eax
+ callMalloc
+ pop eax -- ref to arraymemory
+ pop ebx -- length
+ mov (Disp 0, eax) ebx -- store length at offset 0
+ push eax -- push ref again
+ emit (NEW objidx) = do
+ let objname = buildClassID cls objidx
+ amount <- liftIO $ getObjectSize objname
+ push (amount :: Word32)
+ callMalloc
+ -- TODO(bernhard): save reference somewhere for GC
+ -- set method table pointer
+ mtable <- liftIO $ getMethodTable objname
+ mov (Disp 0, eax) mtable
+ emit (CHECKCAST _) = nop -- TODO(bernhard): ...
emit (BIPUSH val) = push ((fromIntegral val) :: Word32)
+ emit (SIPUSH val) = push ((fromIntegral $ ((fromIntegral val) :: Int16)) :: Word32)
emit (ICONST_0) = push (0 :: Word32)
emit (ICONST_1) = push (1 :: Word32)
emit (ICONST_2) = push (2 :: Word32)
+ emit (ICONST_3) = push (3 :: Word32)
+ emit (ICONST_4) = push (4 :: Word32)
emit (ICONST_5) = push (5 :: Word32)
+ emit (ALOAD_ x) = emit (ILOAD_ x)
emit (ILOAD_ x) = do
push (Disp (cArgs_ x), ebp)
+ emit (ALOAD x) = emit (ILOAD x)
+ emit (ILOAD x) = do
+ push (Disp (cArgs x), ebp)
+ emit (ASTORE_ x) = emit (ISTORE_ x)
emit (ISTORE_ x) = do
pop eax
mov (Disp (cArgs_ x), ebp) eax
+ emit (ASTORE x) = emit (ISTORE x)
+ emit (ISTORE x) = do
+ pop eax
+ mov (Disp (cArgs x), ebp) eax
+
+ emit (LDC1 x) = emit (LDC2 $ fromIntegral x)
+ emit (LDC2 x) = do
+ value <- case (constsPool cls) M.! x of
+ (CString s) -> liftIO $ getUniqueStringAddr s
+ _ -> error $ "LDCI... missing impl."
+ push value
+ emit (GETFIELD x) = do
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ offset <- liftIO $ getFieldOffset cname fname
+ push (Disp (fromIntegral $ offset), eax) -- get field
+ emit (PUTFIELD x) = do
+ pop ebx -- value to write
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ offset <- liftIO $ getFieldOffset cname fname
+ mov (Disp (fromIntegral $ offset), eax) ebx -- set field
+
emit IADD = do pop ebx; pop eax; add eax ebx; push eax
emit ISUB = do pop ebx; pop eax; sub eax ebx; push eax
emit IMUL = do pop ebx; pop eax; mul ebx; push eax
+ emit IXOR = do pop ebx; pop eax; xor eax ebx; push eax
emit (IINC x imm) = do
add (Disp (cArgs x), ebp) (s8_w32 imm)
+ emit (IF_ACMP cond x) = emit (IF_ICMP cond x)
emit (IF_ICMP cond _) = do
pop eax -- value2
pop ebx -- value1
jmp $ getLabel sid lmap
emit RETURN = do mov esp ebp; pop ebp; ret
+ emit ARETURN = emit IRETURN
emit IRETURN = do
pop eax
mov esp ebp
pop ebp
ret
- emit _ = do cmovbe eax eax -- dummy
+ emit invalid = error $ "insn not implemented yet: " ++ (show invalid)
+
+ callMalloc :: CodeGen e s ()
+ callMalloc = do
+ calladdr <- getCurrentOffset
+ let w32_calladdr = 5 + calladdr
+ let malloaddr = (fromIntegral getMallocAddr :: Word32)
+ call (malloaddr - w32_calladdr)
+ add esp (4 :: Word32)
+ push eax
+
+ -- for locals we use a different storage
+ cArgs :: Word8 -> Word32
+ cArgs x = if (x' >= thisMethodArgCnt)
+ -- TODO(bernhard): maybe s/(-4)/(-8)/
+ then fromIntegral $ (-4) * (x' - thisMethodArgCnt + 1)
+ else 4 + (thisMethodArgCnt * 4) - (4 * x')
+ where x' = fromIntegral x
+
+ cArgs_ :: IMM -> Word32
+ cArgs_ x = cArgs $ case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3
+
+ thisMethodArgCnt :: Word32
+ thisMethodArgCnt = isNonStatic + (fromIntegral $ length args)
+ where
+ (Just m) = lookupMethod method cls
+ (MethodSignature args _) = methodSignature m
+ isNonStatic = if S.member ACC_STATIC (methodAccessFlags m)
+ then 0
+ else 1 -- one argument for the this pointer
- cArgs x = (8 + 4 * (fromIntegral x))
- cArgs_ x = (8 + 4 * case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3)
-- sign extension from w8 to w32 (over s8)
-- unfortunately, hs-java is using Word8 everywhere (while
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