emitFromBB :: B.ByteString -> MethodSignature -> Class Direct -> RawMethod -> CodeGen e s (CompileInfo, [Instruction])
-emitFromBB methodname sig cls method = do
- let keys = M.keys hmap
- llmap <- mapM (newNamedLabel . (++) "bb_" . show) keys
- let lmap = zip keys llmap
- ep <- getEntryPoint
- push ebp
- mov ebp esp
- sub esp (fromIntegral ((rawLocals method) * 4) :: Word32)
-
- (calls, bbstarts) <- efBB (0, hmap M.! 0) M.empty M.empty lmap
- d <- disassemble
- end <- getCodeOffset
- return ((ep, bbstarts, end, calls), d)
+emitFromBB methodname sig cls method = do
+ let keys = M.keys hmap
+ llmap <- mapM (newNamedLabel . (++) "bb_" . show) keys
+ let lmap = zip keys llmap
+ ep <- getEntryPoint
+ push ebp
+ mov ebp esp
+ sub esp (fromIntegral ((rawLocals method) * 4) :: Word32)
+
+ (calls, bbstarts) <- efBB (0, hmap M.! 0) M.empty M.empty lmap
+ d <- disassemble
+ end <- getCodeOffset
+ return ((ep, bbstarts, end, calls), d)
where
hmap = rawMapBB method
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)
- else do
- bb_offset <- getCodeOffset
- let bbstarts' = M.insert bid bb_offset bbstarts
- defineLabel $ getLabel bid lmap
- cs <- mapM emit'' $ code bb
- let calls' = calls `M.union` M.fromList (catMaybes cs)
- case successor bb of
- 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
- (calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
- efBB (t2, hmap M.! t2) calls'' bbstarts'' lmap
+ if M.member bid bbstarts then
+ return (calls, bbstarts)
+ else do
+ bb_offset <- getCodeOffset
+ let bbstarts' = M.insert bid bb_offset bbstarts
+ defineLabel $ getLabel bid lmap
+ cs <- mapM emit'' $ code bb
+ let calls' = calls `M.union` M.fromList (catMaybes cs)
+ case successor bb of
+ 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
+ (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
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)
+ 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)
+ -- 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' (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 (`InterfaceMethod` mi)
+ -- 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 (`InterfaceMethod` 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 (`VirtualMethod` mi)
+ -- 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 (`VirtualMethod` mi)
emit' (PUTSTATIC cpidx) = do
- pop eax
- trapaddr <- getCurrentOffset
- mov (Addr 0x00000000) eax -- it's a trap
- return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
+ 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)
+ 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 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
+ 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
+ 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)
+ 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
+ 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)
+ 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
+ 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
+ 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
emit (ISTORE_ x) = emit (ISTORE $ cArgs_ x)
emit (ASTORE x) = emit (ISTORE x)
emit (ISTORE x) = do
- pop eax
- mov (Disp (cArgs x), ebp) eax
+ 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
+ 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
+ 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
+ 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 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)
+ 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 ebx eax -- intel syntax is swapped (TODO(bernhard): test that plz)
- emitIF cond
+ pop eax -- value2
+ pop ebx -- value1
+ 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
- emitIF cond
+ pop eax -- value1
+ cmp eax (0 :: Word32) -- TODO(bernhard): test that plz
+ emitIF cond
emit (GOTO _ ) = do
- let sid = case successor bb of OneTarget t -> t; _ -> error "bad"
- jmp $ getLabel sid lmap
+ 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
emitFieldOffset :: Word16 -> CodeGen e s Int32
emitFieldOffset x = do
- pop eax -- this pointer
- let (cname, fname) = buildFieldOffset cls x
- liftIO $ getFieldOffset cname fname
+ pop eax -- this pointer
+ let (cname, fname) = buildFieldOffset cls x
+ liftIO $ getFieldOffset cname fname
emitIF :: CMP -> CodeGen e s ()
emitIF cond = let
callMalloc :: CodeGen e s ()
callMalloc = do
- call mallocObjectAddr
- add esp (4 :: Word32)
- push eax
+ 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 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 -> Word8
cArgs_ x = case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3
thisMethodArgCnt :: Word32
thisMethodArgCnt = isNonStatic + fromIntegral (length args)
where
- m = fromJust $ lookupMethodSig methodname sig cls
- (MethodSignature args _) = sig
- isNonStatic = if S.member ACC_STATIC (methodAccessFlags m)
- then 0 else 1 -- one argument for the this pointer
+ m = fromJust $ lookupMethodSig methodname sig cls
+ (MethodSignature args _) = sig
+ 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)
projects / mate.git / blobdiff