-{-# 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.Maybe
+import Data.List (genericLength)
import qualified Data.Map as M
-import qualified Data.Set as S
import qualified Data.ByteString.Lazy as B
import Control.Monad
+import Control.Applicative
import Foreign hiding (xor)
import Foreign.C.Types
import Harpy.X86Disassembler
import Mate.BasicBlocks
+import Mate.NativeSizes
import Mate.Types
import Mate.Utilities
import Mate.ClassPool
+import Mate.ClassHierarchy
+import {-# SOURCE #-} Mate.MethodPool
import Mate.Strings
-foreign import ccall "dynamic"
- code_int :: FunPtr (CInt -> CInt -> IO CInt) -> CInt -> CInt -> IO CInt
-
-foreign import ccall "getMallocObjectAddr"
- getMallocObjectAddr :: CUInt
+foreign import ccall "&mallocObjectGC"
+ mallocObjectAddr :: FunPtr (Int -> IO CPtrdiff)
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
- 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) * ptrSize :: 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
where
+ forceRegDump :: CodeGen e s ()
+ forceRegDump = do
+ push esi
+ mov esi (0x13371234 :: Word32)
+ mov esi (Addr 0)
+ pop esi
+
getCurrentOffset :: CodeGen e s Word32
getCurrentOffset = do
ep <- getEntryPoint
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 two nop's at the end, therefore the disasm doesn't screw up
+ emit32 (0x9090ffff :: Word32); nop
+ let patcher reip = do
+ entryAddr <- liftIO $ getMethodEntry l
+ call (fromIntegral (entryAddr - (reip + 5)) :: NativeWord)
+ return reip
+ -- discard arguments on stack
+ let argcnt = ((if hasThis then 1 else 0) + methodGetArgsCount (methodNameTypeByIdx cls cpidx)) * ptrSize
+ when (argcnt > 0) (add esp argcnt)
+ -- push result on stack if method has a return value
+ when (methodHaveReturnValue cls cpidx) (push eax)
+ return $ Just (calladdr, StaticMethod patcher)
+
+ virtualCall :: Word16 -> Bool -> CodeGen e s (Maybe (Word32, TrapCause))
+ virtualCall cpidx isInterface = do
+ let mi@(MethodInfo methodname objname msig@(MethodSignature args _)) = buildMethodID cls cpidx
+ newNamedLabel (show mi) >>= defineLabel
+ -- get method offset for call @ runtime
+ let offset = if isInterface
+ then getInterfaceMethodOffset objname methodname (encode msig)
+ else getMethodOffset objname (methodname `B.append` encode msig)
+ let argsLen = genericLength args
+ -- objref lives somewhere on the argument stack
+ mov ebx (Disp (argsLen * ptrSize), esp)
+ if isInterface
+ then mov ebx (Disp 0, ebx) -- get method-table-ptr, keep it in ebx
+ else return () -- invokevirtual
+ -- get method-table-ptr (or interface-table-ptr)
+ mov eax (Disp 0, ebx)
+ -- make actual (indirect) call
+ calladdr <- getCurrentOffset
+ -- will be patched to this: call (Disp 0xXXXXXXXX, eax)
+ emit32 (0x9090ffff :: Word32); nop; nop
+ -- discard arguments on stack (`+1' for "this")
+ let argcnt = ptrSize * (1 + 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)
+ -- 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, VirtualCall isInterface mi offset)
+
+ 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)
- 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)
+ emit' (INVOKEINTERFACE cpidx _) = virtualCall cpidx True
+ emit' (INVOKEVIRTUAL cpidx) = virtualCall cpidx False
+
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' (GETFIELD x) = do
+ pop eax -- this pointer
+ trapaddr <- getCurrentOffset
+ -- like: 099db064 ff b0 e4 14 00 00 pushl 5348(%eax)
+ emit32 (0x9090ffff :: Word32); nop; nop
+ let patcher reip = do
+ let (cname, fname) = buildFieldOffset cls x
+ offset <- liftIO $ fromIntegral <$> getFieldOffset cname fname
+ push32_rel_eax (Disp offset) -- get field
+ return reip
+ return $ Just (trapaddr, ObjectField patcher)
+ emit' (PUTFIELD x) = do
+ pop ebx -- value to write
+ pop eax -- this pointer
+ trapaddr <- getCurrentOffset
+ -- like: 4581fc6b 89 98 30 7b 00 00 movl %ebx,31536(%eax)
+ emit32 (0x9090ffff :: Word32); nop; nop
+ let patcher reip = do
+ let (cname, fname) = buildFieldOffset cls x
+ offset <- liftIO $ fromIntegral <$> getFieldOffset cname fname
+ mov32_rel_ebx_eax (Disp offset) -- set field
+ return reip
+ return $ Just (trapaddr, ObjectField patcher)
+
+ emit' (INSTANCEOF cpidx) = do
+ pop eax
+ mov eax (Disp 0, eax) -- mtable of objectref
+ trapaddr <- getCurrentOffset
+ -- place something like `mov edx $mtable_of_objref' instead
+ emit32 (0x9090ffff :: Word32); nop
+ push (0 :: Word32)
+ let patcher reax reip = do
+ -- mtable <- liftIO $ getMethodTable (buildClassID cls cpidx)
+ -- mov edx mtable
+ emit32 (0x9090ffff :: Word32); nop
+ let classname = buildClassID cls cpidx
+ check <- liftIO $ isInstanceOf (fromIntegral reax) classname
+ if check
+ then push (1 :: Word32)
+ else push (0 :: Word32)
+ return (reip + 5)
+ -- cmp eax edx
+ -- sete al
+ -- movzxb eax al
+ -- push eax
+ -- forceRegDump
+ return $ Just (trapaddr, InstanceOf patcher)
+ emit' (NEW objidx) = do
+ let objname = buildClassID cls objidx
+ trapaddr <- getCurrentOffset
+ -- place something like `push $objsize' instead
+ emit32 (0x9090ffff :: Word32); nop
+ callMalloc
+ -- 0x13371337 is just a placeholder; will be replaced with mtable ptr
+ mov (Disp 0, eax) (0x13371337 :: Word32)
+ mov (Disp 4, eax) (0x1337babe :: Word32)
+ let patcher reip = do
+ objsize <- liftIO $ getObjectSize objname
+ push32 objsize
+ callMalloc
+ mtable <- liftIO $ getMethodTable objname
+ mov (Disp 0, eax) mtable
+ mov (Disp 4, eax) (0x1337babe :: Word32)
+ return reip
+ return $ Just (trapaddr, NewObject patcher)
+
emit' insn = emit insn >> return Nothing
emit :: J.Instruction -> CodeGen e s ()
- emit POP = add esp (4 :: Word32) -- drop value
+ emit POP = add esp (ptrSize :: 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
- 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 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 (ptrSize :: 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 (CHECKCAST _) = nop -- TODO(bernhard): ...
+ 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
- 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
+ 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 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
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
- 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
-
- 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
+ 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
+
-- 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)
+ cArgs x = ptrSize * (argcount - x' + isLocal)
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
+ x' = fromIntegral x
+ argcount = rawArgCount method
+ isLocal = if x' >= argcount then (-1) else 1
+
+ cArgs_ :: IMM -> Word8
+ cArgs_ x = case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3
-- sign extension from w8 to w32 (over s8)
s8_w32 :: Word8 -> Word32
s8_w32 w8 = fromIntegral s8
where s8 = fromIntegral w8 :: Int8
+
+callMalloc :: CodeGen e s ()
+callMalloc = do
+ call mallocObjectAddr
+ add esp (ptrSize :: Word32)
+ push eax
+
+
+-- harpy tries to cut immediates (or displacements), if they fit in 8bit.
+-- however, this is bad for patching so we want to put always 32bit.
+
+-- push imm32
+push32 :: Word32 -> CodeGen e s ()
+push32 imm32 = emit8 0x68 >> emit32 imm32
+
+-- call disp32(%eax)
+call32_eax :: Disp -> CodeGen e s ()
+call32_eax (Disp disp32) = emit8 0xff >> emit8 0x90 >> emit32 disp32
+
+-- push disp32(%eax)
+push32_rel_eax :: Disp -> CodeGen e s ()
+push32_rel_eax (Disp disp32) = emit8 0xff >> emit8 0xb0 >> emit32 disp32
+
+-- mov %ebx, disp32(%eax)
+mov32_rel_ebx_eax :: Disp -> CodeGen e s ()
+mov32_rel_ebx_eax (Disp disp32) = emit8 0x89 >> emit8 0x98 >> emit32 disp32
projects / mate.git / blobdiff