#include "debug.h"
module Mate.X86CodeGen where
+import Prelude hiding (and, div)
import Data.Binary
import Data.BinaryState
import Data.Int
import Mate.Utilities
import Mate.ClassPool
import Mate.Strings
+#ifdef DEBUG
+import Text.Printf
+#endif
-foreign import ccall "dynamic"
- code_int :: FunPtr (CInt -> CInt -> IO CInt) -> CInt -> CInt -> IO CInt
-
-foreign import ccall "getMallocObjectAddr"
- getMallocObjectAddr :: CUInt
+foreign import ccall "&mallocObject"
+ mallocObjectAddr :: FunPtr (Int -> IO CUInt)
type EntryPoint = Ptr Word8
type EntryPointOffset = Int
type CompileInfo = (EntryPoint, BBStarts, Int, TrapMap)
-emitFromBB :: B.ByteString -> Class Direct -> MapBB -> CodeGen e s (CompileInfo, [Instruction])
-emitFromBB method cls hmap = do
+emitFromBB :: B.ByteString -> MethodSignature -> Class Direct -> MapBB -> CodeGen e s (CompileInfo, [Instruction])
+emitFromBB method sig 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
bb_offset <- getCodeOffset
let bbstarts' = M.insert bid bb_offset bbstarts
defineLabel $ getLabel bid lmap
- cs <- mapM emit' $ code bb
+ cs <- mapM emit'' $ code bb
let calls' = calls `M.union` M.fromList (catMaybes cs)
case successor bb of
Return -> return (calls', bbstarts')
- FallThrough t -> efBB (t, hmap M.! t) calls' bbstarts' lmap
+ FallThrough t -> do
+ -- TODO(bernhard): le dirty hax. see java/lang/Integer.toString(int, int)
+ jmp (getLabel t lmap)
+ efBB (t, hmap M.! t) calls' bbstarts' lmap
OneTarget t -> efBB (t, hmap M.! t) calls' bbstarts' lmap
TwoTarget t1 t2 -> do
(calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
offset <- getCodeOffset
return $ w32_ep + fromIntegral offset
- emitInvoke :: Word16 -> Bool -> CodeGen e s (Maybe (Word32, TrapInfo))
+ emitInvoke :: Word16 -> Bool -> CodeGen e s (Maybe (Word32, TrapCause))
emitInvoke cpidx hasThis = do
let l = buildMethodID cls cpidx
calladdr <- getCurrentOffset
-- push result on stack if method has a return value
when (methodHaveReturnValue cls cpidx) (push eax)
-- +2 is for correcting eip in trap context
- return $ Just (calladdr + 2, MI l)
+ return $ Just (calladdr + 2, StaticMethod l)
+
+ invokeEpilog :: Word16 -> Word32 -> (Bool -> TrapCause) -> CodeGen e s (Maybe (Word32, TrapCause))
+ invokeEpilog cpidx offset trapcause = do
+ -- make actual (indirect) call
+ calladdr <- getCurrentOffset
+ call (Disp offset, eax)
+ -- discard arguments on stack (+4 for "this")
+ let argcnt = 4 + 4 * methodGetArgsCount cls cpidx
+ when (argcnt > 0) (add esp argcnt)
+ -- push result on stack if method has a return value
+ when (methodHaveReturnValue cls cpidx) (push eax)
+ let imm8 = is8BitOffset offset
+ return $ Just (calladdr + (if imm8 then 3 else 6), trapcause imm8)
+
+ emit'' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
+ emit'' insn = newNamedLabel ("jvm_insn: " ++ show insn) >>= defineLabel >> emit' insn
- emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapInfo))
+ emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
emit' (INVOKESPECIAL cpidx) = emitInvoke cpidx True
emit' (INVOKESTATIC cpidx) = emitInvoke cpidx False
emit' (INVOKEINTERFACE cpidx _) = do
mov ebx (Disp 0, eax)
-- get method offset
offset <- liftIO $ getInterfaceMethodOffset ifacename methodname (encode msig)
- -- make actual (indirect) call
- calladdr <- getCurrentOffset
- call (Disp offset, ebx)
- -- discard arguments on stack (+4 for "this")
- let argcnt = 4 + 4 * methodGetArgsCount cls cpidx
- 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.
+ -- note, that "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, II mi)
+ invokeEpilog cpidx offset (\x -> InterfaceMethod x mi)
emit' (INVOKEVIRTUAL cpidx) = do
-- get methodInfo entry
let mi@(MethodInfo methodname objname msig@(MethodSignature args _)) = buildMethodID cls cpidx
-- 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 + 4 * methodGetArgsCount cls cpidx
- 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.
+ -- note, that "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)
+ invokeEpilog cpidx offset (\x -> VirtualMethod x mi)
emit' (PUTSTATIC cpidx) = do
pop eax
trapaddr <- getCurrentOffset
mov (Addr 0x00000000) eax -- it's a trap
- return $ Just (trapaddr, SFI $ buildStaticFieldID cls cpidx)
+ return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
emit' (GETSTATIC cpidx) = do
trapaddr <- getCurrentOffset
mov eax (Addr 0x00000000) -- it's a trap
push eax
- return $ Just (trapaddr, SFI $ buildStaticFieldID cls cpidx)
+ return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
emit' insn = emit insn >> return Nothing
emit :: J.Instruction -> CodeGen e s ()
emit POP = add esp (4 :: Word32) -- drop value
emit DUP = push (Disp 0, esp)
+ emit DUP_X1 = do pop eax; pop ebx; push eax; push ebx; push eax
+ emit DUP_X2 = do pop eax; pop ebx; pop ecx; push eax; push ecx; push ebx; push eax
emit AASTORE = emit IASTORE
emit IASTORE = do
pop eax -- value
add ebx (1 :: Word32)
pop ecx -- aref
mov (ecx, ebx, S4) eax
+ emit CASTORE = do
+ pop eax -- value
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ mov (ecx, ebx, S1) eax -- TODO(bernhard): char is two byte
emit AALOAD = emit IALOAD
emit IALOAD = do
pop ebx -- offset
add ebx (1 :: Word32)
pop ecx -- aref
push (ecx, ebx, S4)
+ emit CALOAD = do
+ pop ebx -- offset
+ add ebx (1 :: Word32)
+ pop ecx -- aref
+ push (ecx, ebx, S1) -- TODO(bernhard): char is two byte
emit ARRAYLENGTH = do
pop eax
push (Disp 0, eax)
emit (NEWARRAY typ) = do
let tsize = case decodeS (0 :: Integer) (B.pack [typ]) of
T_INT -> 4
+ T_CHAR -> 2
_ -> error "newarray: type not implemented yet"
-- get length from stack, but leave it there
mov eax (Disp 0, esp)
mtable <- liftIO $ getMethodTable objname
mov (Disp 0, eax) mtable
emit (CHECKCAST _) = nop -- TODO(bernhard): ...
+ -- TODO(bernhard): ...
+ emit (INSTANCEOF _) = do
+ pop eax
+ push (1 :: Word32)
+ emit ATHROW = nop -- TODO(bernhard): ...
+ emit I2C = do
+ pop eax
+ and eax (0x000000ff :: Word32)
+ push eax
emit (BIPUSH val) = push (fromIntegral val :: Word32)
emit (SIPUSH val) = push (fromIntegral (fromIntegral val :: Int16) :: Word32)
+ emit ACONST_NULL = push (0 :: Word32)
+ emit (ICONST_M1) = push ((-1) :: Word32)
emit (ICONST_0) = push (0 :: Word32)
emit (ICONST_1) = push (1 :: Word32)
emit (ICONST_2) = push (2 :: Word32)
emit (LDC2 x) = do
value <- case constsPool cls M.! x of
(CString s) -> liftIO $ getUniqueStringAddr s
- _ -> error "LDCI... missing impl."
+ (CInteger i) -> liftIO $ return i
+ e -> error $ "LDCI... missing impl.: " ++ show e
push value
emit (GETFIELD x) = do
offset <- emitFieldOffset x
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 IDIV = do pop ebx; pop eax; xor edx edx; div ebx; push eax
+ emit IREM = do pop ebx; pop eax; xor edx edx; div ebx; push edx
emit IXOR = do pop ebx; pop eax; xor eax ebx; push eax
+ emit IUSHR = do pop ecx; pop eax; sar eax cl; push eax
+ emit INEG = do pop eax; neg eax; push eax
emit (IINC x imm) =
add (Disp (cArgs x), ebp) (s8_w32 imm)
+ emit (IFNONNULL x) = emit (IF C_NE x)
+ emit (IFNULL x) = emit (IF C_EQ x)
emit (IF_ACMP cond x) = emit (IF_ICMP cond x)
emit (IF_ICMP cond _) = do
pop eax -- value2
emitIF cond = let
sid = case successor bb of TwoTarget _ t -> t; _ -> error "bad"
l = getLabel sid lmap
- in case cond of
- C_EQ -> je l; C_NE -> jne l
- C_LT -> jl l; C_GT -> jg l
- C_GE -> jge l; C_LE -> jle l
+ sid2 = case successor bb of TwoTarget t _ -> t; _ -> error "bad"
+ l2 = getLabel sid2 lmap
+ in do
+ case cond of
+ C_EQ -> je l; C_NE -> jne l
+ C_LT -> jl l; C_GT -> jg l
+ C_GE -> jge l; C_LE -> jle l
+ -- TODO(bernhard): ugly workaround, to get broken emitBB working
+ -- (it didn't work for gnu/classpath/SystemProperties.java)
+ jmp l2
+
callMalloc :: CodeGen e s ()
callMalloc = do
- calladdr <- getCurrentOffset
- let w32_calladdr = 5 + calladdr
- let malloaddr = fromIntegral getMallocObjectAddr :: Word32
- call (malloaddr - w32_calladdr)
+ call mallocObjectAddr
add esp (4 :: Word32)
push eax
thisMethodArgCnt :: Word32
thisMethodArgCnt = isNonStatic + fromIntegral (length args)
where
- (Just m) = lookupMethod method cls
- (MethodSignature args _) = methodSignature m
+ (Just m) = lookupMethodSig method sig cls
+ (MethodSignature args _) = sig
isNonStatic = if S.member ACC_STATIC (methodAccessFlags m)
then 0 else 1 -- one argument for the this pointer
s8_w32 :: Word8 -> Word32
s8_w32 w8 = fromIntegral s8
where s8 = fromIntegral w8 :: Int8
+
+ is8BitOffset :: Word32 -> Bool
+ is8BitOffset w32 = s32 < 128 && s32 > (-127)
+ where s32 = fromIntegral w32 :: Int32
projects / mate.git / blobdiff