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 qualified JVM.Assembler as J
import JVM.Assembler hiding (Instruction)
import JVM.ClassFile
-import JVM.Converter
import Harpy
import Harpy.X86Disassembler
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
case hmap of
Nothing -> error "sorry, no code generation"
Just hmap' -> do
- let ebb = emitFromBB cls hmap'
+ let ebb = emitFromBB method cls hmap'
(_, Right ((entry, bbstarts, end, _), disasm)) <- runCodeGen ebb () ()
let int_entry = ((fromIntegral $ ptrToIntPtr entry) :: Int)
printf "disasm:\n"
type BBStarts = M.Map BlockID Int
-type CompileInfo = (EntryPoint, BBStarts, Int, CMap)
+type CompileInfo = (EntryPoint, BBStarts, Int, TMap)
-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) -> TMap -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (TMap, 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
+ 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 = (methodGetArgsCount cls cpidx) * 4
+ 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 $ (w32_calladdr, l)
+ 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)
+ let offset = unsafePerformIO $ 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 $ (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
+ calladdr <- getCurrentOffset
-- '5' is the size of the `call' instruction ( + immediate)
- calladdr <- getCodeOffset
- let w32_calladdr = 5 + w32_ep + (fromIntegral calladdr) :: Word32
+ let w32_calladdr = 5 + calladdr
let trapaddr = (fromIntegral getaddr :: Word32)
call (trapaddr - w32_calladdr)
add esp (4 :: Word32)
+ emit DUP = push (Disp 0, esp)
+ emit (NEW objidx) = do
+ let objname = buildClassID cls objidx
+ let amount = unsafePerformIO $ getMethodSize objname
+ push (amount :: Word32)
+ calladdr <- getCurrentOffset
+ let w32_calladdr = 5 + calladdr
+ let malloaddr = (fromIntegral getMallocAddr :: Word32)
+ call (malloaddr - w32_calladdr)
+ add esp (4 :: Word32)
+ push eax
+ -- TODO(bernhard): save reference somewhere for GC
+ -- set method table pointer
+ let mtable = unsafePerformIO $ 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_2) = push (2 :: 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 (GETFIELD x) = do
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ let offset = unsafePerformIO $ getFieldOffset cname fname
+ push (Disp (fromIntegral $ offset * 4), eax) -- get field
+ emit (PUTFIELD x) = do
+ pop ebx -- value to write
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ let offset = unsafePerformIO $ getFieldOffset cname fname
+ mov (Disp (fromIntegral $ offset * 4), 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
ret
emit invalid = error $ "insn not implemented yet: " ++ (show invalid)
- cArgs x = (8 + 4 * (fromIntegral x))
- cArgs_ x = (8 + 4 * case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3)
+ -- 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
+
-- sign extension from w8 to w32 (over s8)
-- unfortunately, hs-java is using Word8 everywhere (while
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