2 {-# LANGUAGE OverloadedStrings #-}
3 {-# LANGUAGE ForeignFunctionInterface #-}
5 module Mate.X86CodeGen where
7 import Prelude hiding (and, div)
9 import Data.BinaryState
12 import qualified Data.Map as M
13 import qualified Data.ByteString.Lazy as B
16 import Foreign hiding (xor)
17 import Foreign.C.Types
19 import qualified JVM.Assembler as J
20 import JVM.Assembler hiding (Instruction)
24 import Harpy.X86Disassembler
26 import Mate.BasicBlocks
27 import Mate.NativeSizes
37 foreign import ccall "&mallocObject"
38 mallocObjectAddr :: FunPtr (Int -> IO CPtrdiff)
40 type EntryPoint = Ptr Word8
41 type EntryPointOffset = Int
42 type PatchInfo = (BlockID, EntryPointOffset)
44 type BBStarts = M.Map BlockID Int
46 type CompileInfo = (EntryPoint, BBStarts, Int, TrapMap)
49 emitFromBB :: Class Direct -> RawMethod -> CodeGen e s (CompileInfo, [Instruction])
50 emitFromBB cls method = do
51 let keys = M.keys hmap
52 llmap <- mapM (newNamedLabel . (++) "bb_" . show) keys
53 let lmap = zip keys llmap
57 sub esp (fromIntegral (rawLocals method) * ptrSize :: Word32)
59 (calls, bbstarts) <- efBB (0, hmap M.! 0) M.empty M.empty lmap
62 return ((ep, bbstarts, end, calls), d)
64 hmap = rawMapBB method
66 getLabel :: BlockID -> [(BlockID, Label)] -> Label
67 getLabel _ [] = error "label not found!"
68 getLabel i ((x,l):xs) = if i==x then l else getLabel i xs
70 efBB :: (BlockID, BasicBlock) -> TrapMap -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (TrapMap, BBStarts)
71 efBB (bid, bb) calls bbstarts lmap =
72 if M.member bid bbstarts then
73 return (calls, bbstarts)
75 bb_offset <- getCodeOffset
76 let bbstarts' = M.insert bid bb_offset bbstarts
77 defineLabel $ getLabel bid lmap
78 cs <- mapM emit'' $ code bb
79 let calls' = calls `M.union` M.fromList (catMaybes cs)
81 Return -> return (calls', bbstarts')
83 -- TODO(bernhard): le dirty hax. see java/lang/Integer.toString(int, int)
85 efBB (t, hmap M.! t) calls' bbstarts' lmap
86 OneTarget t -> efBB (t, hmap M.! t) calls' bbstarts' lmap
88 (calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
89 efBB (t2, hmap M.! t2) calls'' bbstarts'' lmap
90 -- TODO(bernhard): also use metainformation
91 -- TODO(bernhard): implement `emit' as function which accepts a list of
92 -- instructions, so we can use patterns for optimizations
94 forceRegDump :: CodeGen e s ()
97 mov esi (0x13371234 :: Word32)
101 getCurrentOffset :: CodeGen e s Word32
102 getCurrentOffset = do
104 let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
105 offset <- getCodeOffset
106 return $ w32_ep + fromIntegral offset
108 emitInvoke :: Word16 -> Bool -> CodeGen e s (Maybe (Word32, TrapCause))
109 emitInvoke cpidx hasThis = do
110 let l = buildMethodID cls cpidx
111 calladdr <- getCurrentOffset
112 newNamedLabel (show l) >>= defineLabel
113 -- causes SIGILL. in the signal handler we patch it to the acutal call.
114 -- place two nop's at the end, therefore the disasm doesn't screw up
115 emit32 (0x9090ffff :: Word32) >> emit8 (0x90 :: Word8)
116 -- discard arguments on stack
117 let argcnt = ((if hasThis then 1 else 0) + methodGetArgsCount (methodNameTypeByIdx cls cpidx)) * ptrSize
118 when (argcnt > 0) (add esp argcnt)
119 -- push result on stack if method has a return value
120 when (methodHaveReturnValue cls cpidx) (push eax)
121 return $ Just (calladdr, StaticMethod l)
123 invokeEpilog :: Word16 -> Word32 -> (Bool -> TrapCause) -> CodeGen e s (Maybe (Word32, TrapCause))
124 invokeEpilog cpidx offset trapcause = do
125 -- make actual (indirect) call
126 calladdr <- getCurrentOffset
127 call (Disp offset, eax)
128 -- discard arguments on stack (`+1' for "this")
129 let argcnt = ptrSize * (1 + methodGetArgsCount (methodNameTypeByIdx cls cpidx))
130 when (argcnt > 0) (add esp argcnt)
131 -- push result on stack if method has a return value
132 when (methodHaveReturnValue cls cpidx) (push eax)
133 let imm8 = is8BitOffset offset
134 return $ Just (calladdr + (if imm8 then 3 else 6), trapcause imm8)
136 emit'' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
137 emit'' insn = newNamedLabel ("jvm_insn: " ++ show insn) >>= defineLabel >> emit' insn
139 emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
140 emit' (INVOKESPECIAL cpidx) = emitInvoke cpidx True
141 emit' (INVOKESTATIC cpidx) = emitInvoke cpidx False
142 emit' (INVOKEINTERFACE cpidx _) = do
143 -- get methodInfo entry
144 let mi@(MethodInfo methodname ifacename msig@(MethodSignature args _)) = buildMethodID cls cpidx
145 newNamedLabel (show mi) >>= defineLabel
146 -- objref lives somewhere on the argument stack
147 mov eax (Disp ((* ptrSize) $ fromIntegral $ length args), esp)
148 -- get method-table-ptr, keep it in eax (for trap handling)
149 mov eax (Disp 0, eax)
150 -- get interface-table-ptr
151 mov ebx (Disp 0, eax)
153 offset <- liftIO $ getInterfaceMethodOffset ifacename methodname (encode msig)
154 -- note, that "mi" has the wrong class reference here.
155 -- we figure that out at run-time, in the methodpool,
156 -- depending on the method-table-ptr
157 invokeEpilog cpidx offset (`InterfaceMethod` mi)
158 emit' (INVOKEVIRTUAL cpidx) = do
159 -- get methodInfo entry
160 let mi@(MethodInfo methodname objname msig@(MethodSignature args _)) = buildMethodID cls cpidx
161 newNamedLabel (show mi) >>= defineLabel
162 -- objref lives somewhere on the argument stack
163 mov eax (Disp ((* ptrSize) $ fromIntegral $ length args), esp)
164 -- get method-table-ptr
165 mov eax (Disp 0, eax)
167 let nameAndSig = methodname `B.append` encode msig
168 offset <- liftIO $ getMethodOffset objname nameAndSig
169 -- note, that "mi" has the wrong class reference here.
170 -- we figure that out at run-time, in the methodpool,
171 -- depending on the method-table-ptr
172 invokeEpilog cpidx offset (`VirtualMethod` mi)
173 emit' (PUTSTATIC cpidx) = do
175 trapaddr <- getCurrentOffset
176 mov (Addr 0x00000000) eax -- it's a trap
177 return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
178 emit' (GETSTATIC cpidx) = do
179 trapaddr <- getCurrentOffset
180 mov eax (Addr 0x00000000) -- it's a trap
182 return $ Just (trapaddr, StaticField $ buildStaticFieldID cls cpidx)
183 emit' (INSTANCEOF cpidx) = do
185 mov eax (Disp 0, eax) -- mtable of objectref
186 trapaddr <- getCurrentOffset
187 -- place something like `mov edx $mtable_of_objref' instead
188 emit32 (0x9090ffff :: Word32) >> emit8 (0x90 :: Word8)
194 return $ Just (trapaddr, InstanceOf $ buildClassID cls cpidx)
195 emit' insn = emit insn >> return Nothing
197 emit :: J.Instruction -> CodeGen e s ()
198 emit POP = add esp (ptrSize :: Word32) -- drop value
199 emit DUP = push (Disp 0, esp)
200 emit DUP_X1 = do pop eax; pop ebx; push eax; push ebx; push eax
201 emit DUP_X2 = do pop eax; pop ebx; pop ecx; push eax; push ecx; push ebx; push eax
202 emit AASTORE = emit IASTORE
206 add ebx (1 :: Word32)
208 mov (ecx, ebx, S4) eax
212 add ebx (1 :: Word32)
214 mov (ecx, ebx, S1) eax -- TODO(bernhard): char is two byte
215 emit AALOAD = emit IALOAD
218 add ebx (1 :: Word32)
223 add ebx (1 :: Word32)
225 push (ecx, ebx, S1) -- TODO(bernhard): char is two byte
226 emit ARRAYLENGTH = do
229 emit (ANEWARRAY _) = emit (NEWARRAY 10) -- 10 == T_INT
230 emit (NEWARRAY typ) = do
231 let tsize = case decodeS (0 :: Integer) (B.pack [typ]) of
234 _ -> error "newarray: type not implemented yet"
235 -- get length from stack, but leave it there
236 mov eax (Disp 0, esp)
237 mov ebx (tsize :: Word32)
238 -- multiple amount with native size of one element
239 mul ebx -- result is in eax
240 add eax (ptrSize :: Word32) -- for "length" entry
241 -- push amount of bytes to allocate
244 pop eax -- ref to arraymemory
246 mov (Disp 0, eax) ebx -- store length at offset 0
247 push eax -- push ref again
248 emit (NEW objidx) = do
249 let objname = buildClassID cls objidx
250 amount <- liftIO $ getObjectSize objname
251 push (amount :: Word32)
253 -- TODO(bernhard): save reference somewhere for GC
254 -- set method table pointer
255 mtable <- liftIO $ getMethodTable objname
256 mov (Disp 0, eax) mtable
257 emit (CHECKCAST _) = nop -- TODO(bernhard): ...
258 emit ATHROW = -- TODO(bernhard): ...
259 emit32 (0xffffffff :: Word32)
262 and eax (0x000000ff :: Word32)
264 emit (BIPUSH val) = push (fromIntegral val :: Word32)
265 emit (SIPUSH val) = push (fromIntegral (fromIntegral val :: Int16) :: Word32)
266 emit ACONST_NULL = push (0 :: Word32)
267 emit (ICONST_M1) = push ((-1) :: Word32)
268 emit (ICONST_0) = push (0 :: Word32)
269 emit (ICONST_1) = push (1 :: Word32)
270 emit (ICONST_2) = push (2 :: Word32)
271 emit (ICONST_3) = push (3 :: Word32)
272 emit (ICONST_4) = push (4 :: Word32)
273 emit (ICONST_5) = push (5 :: Word32)
275 emit (ALOAD_ x) = emit (ILOAD_ x)
276 emit (ILOAD_ x) = emit (ILOAD $ cArgs_ x)
277 emit (ALOAD x) = emit (ILOAD x)
278 emit (ILOAD x) = push (Disp (cArgs x), ebp)
280 emit (ASTORE_ x) = emit (ISTORE_ x)
281 emit (ISTORE_ x) = emit (ISTORE $ cArgs_ x)
282 emit (ASTORE x) = emit (ISTORE x)
285 mov (Disp (cArgs x), ebp) eax
287 emit (LDC1 x) = emit (LDC2 $ fromIntegral x)
289 value <- case constsPool cls M.! x of
290 (CString s) -> liftIO $ getUniqueStringAddr s
291 (CInteger i) -> liftIO $ return i
292 e -> error $ "LDCI... missing impl.: " ++ show e
294 emit (GETFIELD x) = do
295 offset <- emitFieldOffset x
296 push (Disp (fromIntegral offset), eax) -- get field
297 emit (PUTFIELD x) = do
298 pop ebx -- value to write
299 offset <- emitFieldOffset x
300 mov (Disp (fromIntegral offset), eax) ebx -- set field
302 emit IADD = do pop ebx; pop eax; add eax ebx; push eax
303 emit ISUB = do pop ebx; pop eax; sub eax ebx; push eax
304 emit IMUL = do pop ebx; pop eax; mul ebx; push eax
305 emit IDIV = do pop ebx; pop eax; xor edx edx; div ebx; push eax
306 emit IREM = do pop ebx; pop eax; xor edx edx; div ebx; push edx
307 emit IXOR = do pop ebx; pop eax; xor eax ebx; push eax
308 emit IUSHR = do pop ecx; pop eax; sar eax cl; push eax
309 emit INEG = do pop eax; neg eax; push eax
311 add (Disp (cArgs x), ebp) (s8_w32 imm)
313 emit (IFNONNULL x) = emit (IF C_NE x)
314 emit (IFNULL x) = emit (IF C_EQ x)
315 emit (IF_ACMP cond x) = emit (IF_ICMP cond x)
316 emit (IF_ICMP cond _) = do
319 cmp ebx eax -- intel syntax is swapped (TODO(bernhard): test that plz)
322 emit (IF cond _) = do
324 cmp eax (0 :: Word32) -- TODO(bernhard): test that plz
328 let sid = case successor bb of OneTarget t -> t; _ -> error "bad"
329 jmp $ getLabel sid lmap
331 emit RETURN = do mov esp ebp; pop ebp; ret
332 emit ARETURN = emit IRETURN
333 emit IRETURN = do pop eax; emit RETURN
334 emit invalid = error $ "insn not implemented yet: " ++ show invalid
336 emitFieldOffset :: Word16 -> CodeGen e s Int32
337 emitFieldOffset x = do
338 pop eax -- this pointer
339 let (cname, fname) = buildFieldOffset cls x
340 liftIO $ getFieldOffset cname fname
342 emitIF :: CMP -> CodeGen e s ()
344 sid = case successor bb of TwoTarget _ t -> t; _ -> error "bad"
345 l = getLabel sid lmap
346 sid2 = case successor bb of TwoTarget t _ -> t; _ -> error "bad"
347 l2 = getLabel sid2 lmap
350 C_EQ -> je l; C_NE -> jne l
351 C_LT -> jl l; C_GT -> jg l
352 C_GE -> jge l; C_LE -> jle l
353 -- TODO(bernhard): ugly workaround, to get broken emitBB working
354 -- (it didn't work for gnu/classpath/SystemProperties.java)
358 callMalloc :: CodeGen e s ()
360 call mallocObjectAddr
361 add esp (ptrSize :: Word32)
364 -- for locals we use a different storage
365 cArgs :: Word8 -> Word32
366 cArgs x = ptrSize * (argcount - x' + isLocal)
369 argcount = rawArgCount method
370 isLocal = if x' >= argcount then (-1) else 1
372 cArgs_ :: IMM -> Word8
373 cArgs_ x = case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3
376 -- sign extension from w8 to w32 (over s8)
377 -- unfortunately, hs-java is using Word8 everywhere (while
378 -- it should be Int8 actually)
379 s8_w32 :: Word8 -> Word32
380 s8_w32 w8 = fromIntegral s8
381 where s8 = fromIntegral w8 :: Int8
383 is8BitOffset :: Word32 -> Bool
384 is8BitOffset w32 = s32 < 128 && s32 > (-127)
385 where s32 = fromIntegral w32 :: Int32