X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=Mate%2FX86CodeGen.hs;h=df39e5f858c7251057912d1167bfdc6c3a25922c;hb=03ddf0056a8ebae7ce10d694bbf906c276677a33;hp=a44a5d04f45785afdc7a569b0286a1c57f8c3638;hpb=4c504fbb0b276782af6cd250e5e9fd4fdcc26967;p=mate.git diff --git a/Mate/X86CodeGen.hs b/Mate/X86CodeGen.hs index a44a5d0..df39e5f 100644 --- a/Mate/X86CodeGen.hs +++ b/Mate/X86CodeGen.hs @@ -4,12 +4,12 @@ #include "debug.h" module Mate.X86CodeGen where +import Prelude hiding (and, div) 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 @@ -28,13 +28,13 @@ import Mate.Types 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 @@ -45,43 +45,47 @@ type BBStarts = M.Map BlockID Int type CompileInfo = (EntryPoint, BBStarts, Int, TrapMap) -emitFromBB :: B.ByteString -> Class Direct -> 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 - end <- getCodeOffset - return ((ep, bbstarts, end, calls), d) +emitFromBB :: Class Direct -> RawMethod -> CodeGen e s (CompileInfo, [Instruction]) +emitFromBB 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 + 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) -> 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 -> 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 @@ -93,188 +97,221 @@ emitFromBB method cls hmap = do 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 - 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, MI l) - - emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapInfo)) + 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 $ methodNameTypeByIdx 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 $ methodNameTypeByIdx 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) - -- 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. - -- we figure that out at run-time, in the methodpool, - -- depending on the method-table-ptr - return $ Just (calladdr, II 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 - -- 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. - -- we figure that out at run-time, in the methodpool, - -- depending on the method-table-ptr - return $ Just (calladdr, VI 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, SFI $ 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, SFI $ 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 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 + 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) + 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) + 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 + 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 + pop eax + push (1 :: Word32) + emit ATHROW = -- TODO(bernhard): ... + emit32 (0xffffffff :: Word32) + 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 (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 (ILOAD_ x) = emit (ILOAD $ cArgs_ x) 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 (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 - _ -> error "LDCI... missing impl." - 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 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) + 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 @@ -283,46 +320,45 @@ emitFromBB method cls hmap = do 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 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) - 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_ :: IMM -> Word32 - cArgs_ x = cArgs $ case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3 + cArgs x = + if x' >= argcount + -- TODO(bernhard): maybe s/(-4)/(-8)/ + then (-4) * (x' - argcount + 1) + else 4 + (argcount * 4) - (4 * x') + where + x' = fromIntegral x + argcount = rawArgCount method - 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_ :: IMM -> Word8 + cArgs_ x = case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3 -- sign extension from w8 to w32 (over s8) @@ -331,3 +367,7 @@ emitFromBB method cls hmap = do 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