1 {-# LANGUAGE OverloadedStrings #-}
2 {-# LANGUAGE ForeignFunctionInterface #-}
3 module Mate.X86CodeGen where
8 import qualified Data.Map as M
9 import qualified Data.ByteString.Lazy as B
13 import Foreign.C.Types
17 import qualified JVM.Assembler as J
18 import JVM.Assembler hiding (Instruction)
23 import Harpy.X86Disassembler
25 import Mate.BasicBlocks
30 foreign import ccall "dynamic"
31 code_int :: FunPtr (CInt -> CInt -> IO CInt) -> (CInt -> CInt -> IO CInt)
33 foreign import ccall "getaddr"
36 foreign import ccall "callertrap"
39 foreign import ccall "register_signal"
40 register_signal :: IO ()
42 foreign import ccall "get_cmap"
43 get_cmap :: IO (Ptr ())
45 foreign import ccall "set_cmap"
46 set_cmap :: Ptr () -> IO ()
48 test_01, test_02, test_03 :: IO ()
51 (entry, end) <- testCase "./tests/Fib" "fib"
52 let entryFuncPtr = ((castPtrToFunPtr entry) :: FunPtr (CInt -> CInt -> IO CInt))
55 result <- code_int entryFuncPtr x 0
56 let iresult :: Int; iresult = fromIntegral result
57 let kk :: String; kk = if iresult == (fib x) then "OK" else "FAIL (" ++ (show (fib x)) ++ ")"
58 printf "result of fib(%2d): %3d\t\t%s\n" (fromIntegral x :: Int) iresult kk
59 ) $ ([0..10] :: [CInt])
60 printf "patched disasm:\n"
61 Right newdisasm <- disassembleBlock entry end
62 mapM_ (putStrLn . showAtt) newdisasm
67 | otherwise = (fib (n - 1)) + (fib (n - 2))
71 (entry,_) <- testCase "./tests/While" "f"
72 let entryFuncPtr = ((castPtrToFunPtr entry) :: FunPtr (CInt -> CInt -> IO CInt))
73 result <- code_int entryFuncPtr 5 4
74 let iresult :: Int; iresult = fromIntegral result
75 let kk :: String; kk = if iresult == 15 then "OK" else "FAIL"
76 printf "result of f(5,4): %3d\t\t%s\n" iresult kk
78 result2 <- code_int entryFuncPtr 4 3
79 let iresult2 :: Int; iresult2 = fromIntegral result2
80 let kk2 :: String; kk2 = if iresult2 == 10 then "OK" else "FAIL"
81 printf "result of f(4,3): %3d\t\t%s\n" iresult2 kk2
85 (entry,_) <- testCase "./tests/While" "g"
86 let entryFuncPtr = ((castPtrToFunPtr entry) :: FunPtr (CInt -> CInt -> IO CInt))
87 result <- code_int entryFuncPtr 5 4
88 let iresult :: Int; iresult = fromIntegral result
89 let kk :: String; kk = if iresult == 15 then "OK" else "FAIL"
90 printf "result of g(5,4): %3d\t\t%s\n" iresult kk
92 result2 <- code_int entryFuncPtr 4 3
93 let iresult2 :: Int; iresult2 = fromIntegral result2
94 let kk2 :: String; kk2 = if iresult2 == 10 then "OK" else "FAIL"
95 printf "result of g(4,3): %3d\t\t%s\n" iresult2 kk2
98 testCase :: B.ByteString -> B.ByteString -> IO (Ptr Word8, Int)
99 testCase cf method = do
100 cls <- getClassFile cf
101 hmap <- parseMethod cls method
104 Nothing -> error "sorry, no code generation"
106 let ebb = emitFromBB cls hmap'
107 (_, Right ((entry, bbstarts, end, _), disasm)) <- runCodeGen ebb () ()
108 let int_entry = ((fromIntegral $ ptrToIntPtr entry) :: Int)
110 mapM_ (putStrLn . showAtt) disasm
111 printf "basicblocks addresses:\n"
112 let b = map (\(x,y) -> (x,y + int_entry)) $ M.toList bbstarts
113 mapM_ (\(x,y) -> printf "\tBasicBlock %2d starts at 0x%08x\n" x y) b
116 type EntryPoint = Ptr Word8
117 type EntryPointOffset = Int
118 type PatchInfo = (BlockID, EntryPointOffset)
120 type BBStarts = M.Map BlockID Int
122 type CompileInfo = (EntryPoint, BBStarts, Int, CMap)
125 emitFromBB :: Class Resolved -> MapBB -> CodeGen e s (CompileInfo, [Instruction])
126 emitFromBB cls hmap = do
127 llmap <- sequence [newNamedLabel ("bb_" ++ show x) | (x,_) <- M.toList hmap]
128 let lmap = zip (Prelude.fst $ unzip $ M.toList hmap) llmap
133 (calls, bbstarts) <- efBB (0,(hmap M.! 0)) M.empty M.empty lmap
136 return ((ep, bbstarts, end, calls), d)
138 getLabel :: BlockID -> [(BlockID, Label)] -> Label
139 getLabel _ [] = error "label not found!"
140 getLabel i ((x,l):xs) = if i==x then l else getLabel i xs
142 efBB :: (BlockID, BasicBlock) -> CMap -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (CMap, BBStarts)
143 efBB (bid, bb) calls bbstarts lmap =
144 if M.member bid bbstarts then
145 return (calls, bbstarts)
147 bb_offset <- getCodeOffset
148 let bbstarts' = M.insert bid bb_offset bbstarts
149 defineLabel $ getLabel bid lmap
150 cs <- mapM emit' $ code bb
151 let calls' = calls `M.union` (M.fromList $ catMaybes cs)
153 Return -> return (calls', bbstarts')
155 efBB (t, hmap M.! t) calls' bbstarts' lmap
157 efBB (t, hmap M.! t) calls' bbstarts' lmap
158 TwoTarget t1 t2 -> do
159 (calls'', bbstarts'') <- efBB (t1, hmap M.! t1) calls' bbstarts' lmap
160 efBB (t2, hmap M.! t2) calls'' bbstarts'' lmap
161 -- TODO(bernhard): also use metainformation
162 -- TODO(bernhard): implement `emit' as function which accepts a list of
163 -- instructions, so we can use patterns for optimizations
165 emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, MethodInfo))
166 emit' (INVOKESTATIC cpidx) = do
168 let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
169 let l = buildMethodID cls cpidx
170 calladdr <- getCodeOffset
171 let w32_calladdr = w32_ep + (fromIntegral calladdr) :: Word32
172 newNamedLabel (show l) >>= defineLabel
173 -- causes SIGILL. in the signal handler we patch it to the acutal call.
174 -- place a nop at the end, therefore the disasm doesn't screw up
175 emit32 (0xffff9090 :: Word32) >> emit8 (0x90 :: Word8)
176 -- discard arguments on stack
177 let argcnt = (methodGetArgsCount cls cpidx) * 4
178 when (argcnt > 0) (add esp argcnt)
179 -- push result on stack if method has a return value
180 when (methodHaveReturnValue cls cpidx) (push eax)
181 return $ Just $ (w32_calladdr, l)
182 emit' insn = emit insn >> return Nothing
184 emit :: J.Instruction -> CodeGen e s ()
185 emit POP = do -- print dropped value
187 let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
188 -- '5' is the size of the `call' instruction ( + immediate)
189 calladdr <- getCodeOffset
190 let w32_calladdr = 5 + w32_ep + (fromIntegral calladdr) :: Word32
191 let trapaddr = (fromIntegral getaddr :: Word32)
192 call (trapaddr - w32_calladdr)
193 add esp (4 :: Word32)
194 emit (BIPUSH val) = push ((fromIntegral val) :: Word32)
195 emit (SIPUSH val) = push ((fromIntegral $ ((fromIntegral val) :: Int16)) :: Word32)
196 emit (ICONST_0) = push (0 :: Word32)
197 emit (ICONST_1) = push (1 :: Word32)
198 emit (ICONST_2) = push (2 :: Word32)
199 emit (ICONST_4) = push (4 :: Word32)
200 emit (ICONST_5) = push (5 :: Word32)
202 push (Disp (cArgs_ x), ebp)
203 emit (ISTORE_ x) = do
205 mov (Disp (cArgs_ x), ebp) eax
206 emit IADD = do pop ebx; pop eax; add eax ebx; push eax
207 emit ISUB = do pop ebx; pop eax; sub eax ebx; push eax
208 emit IMUL = do pop ebx; pop eax; mul ebx; push eax
209 emit (IINC x imm) = do
210 add (Disp (cArgs x), ebp) (s8_w32 imm)
212 emit (IF_ICMP cond _) = do
215 cmp ebx eax -- intel syntax is swapped (TODO(bernhard): test that plz)
216 let sid = case successor bb of TwoTarget _ t -> t; _ -> error "bad"
217 let l = getLabel sid lmap
219 C_EQ -> je l; C_NE -> jne l
220 C_LT -> jl l; C_GT -> jg l
221 C_GE -> jge l; C_LE -> jle l
223 emit (IF cond _) = do
225 cmp eax (0 :: Word32) -- TODO(bernhard): test that plz
226 let sid = case successor bb of TwoTarget _ t -> t; _ -> error "bad"
227 let l = getLabel sid lmap
229 C_EQ -> je l; C_NE -> jne l
230 C_LT -> jl l; C_GT -> jg l
231 C_GE -> jge l; C_LE -> jle l
234 let sid = case successor bb of OneTarget t -> t; _ -> error "bad"
235 jmp $ getLabel sid lmap
237 emit RETURN = do mov esp ebp; pop ebp; ret
243 emit invalid = error $ "insn not implemented yet: " ++ (show invalid)
245 cArgs x = (8 + 4 * (fromIntegral x))
246 cArgs_ x = (8 + 4 * case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3)
248 -- sign extension from w8 to w32 (over s8)
249 -- unfortunately, hs-java is using Word8 everywhere (while
250 -- it should be Int8 actually)
251 s8_w32 :: Word8 -> Word32
252 s8_w32 w8 = fromIntegral s8
253 where s8 = (fromIntegral w8) :: Int8