X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=Mate%2FX86CodeGen.hs;h=fb62c905d3332d67c3188e5b81cba239e809a676;hb=c803146cc80b61305fde8279f0a36f8fe6ef7eb2;hp=260e90e016cc1b44754521046a76eece27d411da;hpb=0259ec86e0eb9620322527226e8aa059079e43da;p=mate.git

diff --git a/Mate/X86CodeGen.hs b/Mate/X86CodeGen.hs
index 260e90e..fb62c90 100644
--- a/Mate/X86CodeGen.hs
+++ b/Mate/X86CodeGen.hs
@@ -1,47 +1,42 @@
+{-# 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.List
 import Data.Maybe
+import Data.List (genericLength)
 import qualified Data.Map as M
 import qualified Data.ByteString.Lazy as B
+import Control.Monad
 
-import Foreign
-import Foreign.Ptr
+import Foreign hiding (xor)
 import Foreign.C.Types
 
-import Text.Printf
-
 import qualified JVM.Assembler as J
 import JVM.Assembler hiding (Instruction)
+import JVM.ClassFile
 
 import Harpy
 import Harpy.X86Disassembler
 
 import Mate.BasicBlocks
+import Mate.NativeSizes
+import Mate.Types
+import Mate.Utilities
+import Mate.ClassPool
+import Mate.Strings
+#ifdef DEBUG
+import Text.Printf
+#endif
 
-test_01, test_02, test_03 :: IO ()
-test_01 = testCase "./tests/Fib.class" "fib"
-test_02 = testCase "./tests/While.class" "f"
-test_03 = testCase "./tests/While.class" "g"
-
-testCase :: String -> B.ByteString -> IO ()
-testCase cf method = do
-      hmap <- parseMethod cf method
-      printMapBB hmap
-      case hmap of
-        Nothing -> putStrLn "sorry, no code generation"
-        Just hmap -> do
-              let ebb = emitFromBB hmap
-              (_, Right ((entry, bbstarts), disasm)) <- runCodeGen ebb () ()
-              let int_entry = ((fromIntegral $ ptrToIntPtr entry) :: Int)
-              printf "disasm:\n"
-              mapM_ (putStrLn . showAtt) disasm
-              printf "basicblocks addresses:\n"
-              let b = map (\(x,y) -> (x,y + int_entry)) $ M.toList bbstarts
-              mapM_ (\(x,y) -> printf "\tBasicBlock %2d starts at 0x%08x\n" x y) b
+
+foreign import ccall "&mallocObject"
+  mallocObjectAddr :: FunPtr (Int -> IO CPtrdiff)
 
 type EntryPoint = Ptr Word8
 type EntryPointOffset = Int
@@ -49,93 +44,329 @@ type PatchInfo = (BlockID, EntryPointOffset)
 
 type BBStarts = M.Map BlockID Int
 
-type CompileInfo = (EntryPoint, BBStarts)
-
-emitFromBB :: MapBB -> CodeGen e s (CompileInfo, [Instruction])
-emitFromBB 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
-        bbstarts <- efBB (0,(hmap M.! 0)) M.empty lmap
-        mov esp ebp
-        pop ebp
-        ret
-        d <- disassemble
-        return ((ep, bbstarts), d)
+type CompileInfo = (EntryPoint, BBStarts, Int, TrapMap)
+
+
+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) -> BBStarts -> [(BlockID, Label)] -> CodeGen e s (BBStarts)
-  efBB (bid, bb) bbstarts lmap =
-        if M.member bid bbstarts then
-          return bbstarts
-        else do
-          bb_offset <- getCodeOffset
-          let bbstarts' = M.insert bid bb_offset bbstarts
-          defineLabel $ getLabel bid lmap
-          mapM emit $ code bb
-          case successor bb of
-            Return -> return bbstarts'
-            OneTarget t -> do
-              efBB (t, hmap M.! t) bbstarts' lmap
-            TwoTarget t1 t2 -> do
-              bbstarts'' <- efBB (t1, hmap M.! t1) bbstarts' lmap
-              efBB (t2, hmap M.! t2) bbstarts'' lmap
+  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
     -- 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
+      let w32_ep = (fromIntegral $ ptrToIntPtr ep) :: Word32
+      offset <- getCodeOffset
+      return $ w32_ep + fromIntegral offset
+
+    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 two nop's at the end, therefore the disasm doesn't screw up
+      emit32 (0x9090ffff :: Word32); nop
+      -- 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 l)
+
+    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 _) = 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, 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)
+    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
+      cmp eax edx
+      sete al
+      movzxb eax al
+      push eax
+      forceRegDump
+      return $ Just (trapaddr, InstanceOf $ buildClassID cls cpidx)
+    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)
+      return $ Just (trapaddr, NewObject objname)
+
+    emit' insn = emit insn >> return Nothing
+
     emit :: J.Instruction -> CodeGen e s ()
+    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
+    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)
+    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)
+    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 (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 (ILOAD_ x) = do
-        push (Disp (cArgs_ x), ebp)
-    emit (ISTORE_ x) = do
-        pop eax
-        mov (Disp (cArgs_ x), ebp) eax
+    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) = 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) = emit (ISTORE $ cArgs_ x)
+    emit (ASTORE x) = emit (ISTORE x)
+    emit (ISTORE x) = do
+      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
+    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
+
     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 (IINC x imm) = do
-        add (Disp (cArgs x), ebp) (s8_w32 imm)
+    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)
 
+    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 eax ebx -- intel syntax is swapped (TODO(bernhard): test that plz)
-        let sid = case successor bb of TwoTarget _ t -> t
-        let l = getLabel sid lmap
-        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
+      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
-        let sid = case successor bb of TwoTarget _ t -> t
-        let l = getLabel sid lmap
+      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
+
+    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
+      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
 
-    emit (GOTO _ ) = do
-        let sid = case successor bb of OneTarget t -> t
-        jmp $ getLabel sid lmap
 
-    emit IRETURN = do pop eax
-    emit _ = do cmovbe eax eax -- dummy
+    callMalloc :: CodeGen e s ()
+    callMalloc = do
+      call mallocObjectAddr
+      add esp (ptrSize :: Word32)
+      push eax
+
+  -- for locals we use a different storage
+  cArgs :: Word8 -> Word32
+  cArgs x = ptrSize * (argcount - x' + isLocal)
+    where
+      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
 
-  cArgs x = (8 + 4 * (fromIntegral x))
-  cArgs_ x = (8 + 4 * case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3)
 
   -- sign extension from w8 to w32 (over s8)
   --   unfortunately, hs-java is using Word8 everywhere (while
   --   it should be Int8 actually)
   s8_w32 :: Word8 -> Word32
   s8_w32 w8 = fromIntegral s8
-    where s8 = (fromIntegral w8) :: Int8
+    where s8 = fromIntegral w8 :: Int8