+{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE ForeignFunctionInterface #-}
+#include "debug.h"
module Mate.X86CodeGen where
+import Prelude hiding (and, div)
import Data.Binary
+import Data.BinaryState
import Data.Int
-import Data.List
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.Ptr
+import Foreign hiding (xor)
import Foreign.C.Types
-import Text.Printf
-
import qualified JVM.Assembler as J
import JVM.Assembler hiding (Instruction)
+import JVM.ClassFile
import Harpy
import Harpy.X86Disassembler
import Mate.BasicBlocks
+import Mate.Types
+import Mate.Utilities
+import Mate.ClassPool
+import Mate.Strings
+#ifdef DEBUG
+import Text.Printf
+#endif
-test_01, test_02, test_03 :: IO ()
-test_01 = testCase "./tests/Fib.class" "fib"
-test_02 = testCase "./tests/While.class" "f"
-test_03 = testCase "./tests/While.class" "g"
-
-testCase :: String -> B.ByteString -> IO ()
-testCase cf method = do
- hmap <- parseMethod cf method
- printMapBB hmap
- case hmap of
- Nothing -> putStrLn "sorry, no code generation"
- Just hmap -> do
- let ebb = emitFromBB hmap
- (_, Right ((entry, bbstarts), 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
+
+foreign import ccall "&mallocObject"
+ mallocObjectAddr :: FunPtr (Int -> IO CUInt)
type EntryPoint = Ptr Word8
type EntryPointOffset = Int
type BBStarts = M.Map BlockID Int
-type CompileInfo = (EntryPoint, BBStarts)
+type CompileInfo = (EntryPoint, BBStarts, Int, TrapMap)
+
-emitFromBB :: MapBB -> CodeGen e s (CompileInfo, [Instruction])
-emitFromBB 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
push ebp
mov ebp esp
- bbstarts <- efBB (0,(hmap M.! 0)) M.empty lmap
- mov esp ebp
- pop ebp
- ret
+ -- 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
- return ((ep, bbstarts), d)
+ end <- getCodeOffset
+ return ((ep, bbstarts, end, calls), d)
where
getLabel :: BlockID -> [(BlockID, Label)] -> Label
getLabel _ [] = error "label not found!"
getLabel i ((x,l):xs) = if i==x then l else getLabel i xs
- efBB :: (BlockID, BasicBlock) -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (BBStarts)
- efBB (bid, bb) bbstarts lmap =
+ 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 bbstarts
+ return (calls, bbstarts)
else do
bb_offset <- getCodeOffset
let bbstarts' = M.insert bid bb_offset bbstarts
defineLabel $ getLabel bid lmap
- mapM emit $ code bb
+ cs <- mapM emit'' $ code bb
+ let calls' = calls `M.union` M.fromList (catMaybes cs)
case successor bb of
- Return -> return bbstarts'
- OneTarget t -> do
- efBB (t, hmap M.! t) bbstarts' lmap
+ Return -> return (calls', bbstarts')
+ 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
- bbstarts'' <- efBB (t1, hmap M.! t1) bbstarts' lmap
- efBB (t2, hmap M.! t2) bbstarts'' lmap
+ (calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
+ efBB (t2, hmap M.! t2) calls'' bbstarts'' lmap
-- TODO(bernhard): also use metainformation
-- TODO(bernhard): implement `emit' as function which accepts a list of
-- instructions, so we can use patterns for optimizations
where
+ 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, TrapCause))
+ emitInvoke cpidx hasThis = do
+ let l = buildMethodID cls cpidx
+ 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)
+ -- +2 is for correcting eip in trap context
+ 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, TrapCause))
+ emit' (INVOKESPECIAL cpidx) = emitInvoke cpidx True
+ emit' (INVOKESTATIC cpidx) = emitInvoke cpidx False
+ emit' (INVOKEINTERFACE cpidx _) = do
+ -- get methodInfo entry
+ let mi@(MethodInfo methodname ifacename 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, keep it in eax (for trap handling)
+ mov eax (Disp 0, eax)
+ -- get interface-table-ptr
+ mov ebx (Disp 0, eax)
+ -- get method offset
+ offset <- liftIO $ getInterfaceMethodOffset ifacename methodname (encode msig)
+ -- 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
+ 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
+ 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
+ -- 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
+ 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, StaticField $ buildStaticFieldID cls cpidx)
+ emit' (GETSTATIC cpidx) = do
+ trapaddr <- getCurrentOffset
+ mov eax (Addr 0x00000000) -- it's a trap
+ push eax
+ 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
+ pop ebx -- offset
+ 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 (ANEWARRAY _) = emit (NEWARRAY 10) -- 10 == T_INT
+ 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)
+ 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): ...
+ -- 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 (ILOAD_ x) = do
- push (Disp (cArgs_ x), ebp)
+ 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) = push (Disp (cArgs_ x), ebp)
+ emit (ALOAD x) = emit (ILOAD x)
+ emit (ILOAD x) = 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
+ (CInteger i) -> liftIO $ return i
+ e -> error $ "LDCI... missing impl.: " ++ show e
+ push value
+ emit (GETFIELD x) = do
+ offset <- emitFieldOffset x
+ push (Disp (fromIntegral offset), eax) -- get field
+ emit (PUTFIELD x) = do
+ pop ebx -- value to write
+ offset <- emitFieldOffset x
+ 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 (IINC x imm) = do
+ 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
pop ebx -- value1
- cmp eax ebx -- intel syntax is swapped (TODO(bernhard): test that plz)
- let sid = case successor bb of TwoTarget _ t -> t
- let l = getLabel sid lmap
- 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
+ cmp ebx eax -- intel syntax is swapped (TODO(bernhard): test that plz)
+ emitIF cond
emit (IF cond _) = do
pop eax -- value1
cmp eax (0 :: Word32) -- TODO(bernhard): test that plz
- let sid = case successor bb of TwoTarget _ t -> t
- let l = getLabel sid lmap
+ emitIF cond
+
+ emit (GOTO _ ) = do
+ let sid = case successor bb of OneTarget t -> t; _ -> error "bad"
+ jmp $ getLabel sid lmap
+
+ emit RETURN = do mov esp ebp; pop ebp; ret
+ emit ARETURN = emit IRETURN
+ emit IRETURN = do pop eax; emit RETURN
+ emit invalid = error $ "insn not implemented yet: " ++ show invalid
+
+ emitFieldOffset :: Word16 -> CodeGen e s Int32
+ emitFieldOffset x = do
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ liftIO $ getFieldOffset cname fname
+
+ emitIF :: CMP -> CodeGen e s ()
+ emitIF cond = let
+ sid = case successor bb of TwoTarget _ t -> t; _ -> error "bad"
+ l = getLabel sid lmap
+ 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
- emit (GOTO _ ) = do
- let sid = case successor bb of OneTarget t -> t
- jmp $ getLabel sid lmap
- emit IRETURN = do pop eax
- emit _ = do cmovbe eax eax -- dummy
+ callMalloc :: CodeGen e s ()
+ callMalloc = do
+ call mallocObjectAddr
+ 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) = 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
- 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
-- it should be Int8 actually)
s8_w32 :: Word8 -> Word32
s8_w32 w8 = fromIntegral s8
- where s8 = (fromIntegral w8) :: Int8
+ where s8 = fromIntegral w8 :: Int8
+
+ is8BitOffset :: Word32 -> Bool
+ is8BitOffset w32 = s32 < 128 && s32 > (-127)
+ where s32 = fromIntegral w32 :: Int32
projects / mate.git / blobdiff