import Data.Maybe
import qualified Data.Map as M
import qualified Data.ByteString.Lazy as B
+import Control.Monad
import Foreign
import Foreign.C.Types
import Harpy.X86Disassembler
import Mate.BasicBlocks
+import Mate.Types
import Mate.Utilities
foreign import ccall "dynamic"
type CompileInfo = (EntryPoint, BBStarts, Int, CMap)
--- B.ByteString: encoded name: <Class>.<methodname><signature>
--- Class Resolved: classfile
--- Word16: index of invoke-instruction
-type MethodInfo = (B.ByteString, Class Resolved, Word16)
-
--- Word32 = point of method call in generated code
--- MethodInfo = relevant information about callee
-type CMap = M.Map Word32 MethodInfo
-
emitFromBB :: Class Resolved -> MapBB -> CodeGen e s (CompileInfo, [Instruction])
emitFromBB cls hmap = do
let l = buildMethodID cls cpidx
calladdr <- getCodeOffset
let w32_calladdr = w32_ep + (fromIntegral calladdr) :: Word32
- newNamedLabel (toString l) >>= defineLabel
+ 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 (0xffffffff :: Word32) >> emit8 (0x90 :: Word8)
- -- discard arguments (TODO(bernhard): don't hardcode it)
- add esp (4 :: Word32)
- -- push result on stack (TODO(bernhard): if any)
- push eax
- return $ Just $ (w32_calladdr, (l, cls, cpidx))
+ emit32 (0xffff9090 :: Word32) >> emit8 (0x90 :: Word8)
+ -- discard arguments on stack
+ let argcnt = (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)
+ return $ Just $ (w32_calladdr, l)
emit' insn = emit insn >> return Nothing
emit :: J.Instruction -> CodeGen e s ()
call (trapaddr - w32_calladdr)
add esp (4 :: Word32)
emit (BIPUSH val) = push ((fromIntegral val) :: Word32)
+ emit (SIPUSH val) = push ((fromIntegral $ ((fromIntegral val) :: Int16)) :: Word32)
emit (ICONST_0) = push (0 :: Word32)
emit (ICONST_1) = push (1 :: Word32)
emit (ICONST_2) = push (2 :: Word32)
+ emit (ICONST_4) = push (4 :: Word32)
emit (ICONST_5) = push (5 :: Word32)
emit (ILOAD_ x) = do
push (Disp (cArgs_ x), ebp)
mov esp ebp
pop ebp
ret
- emit _ = do cmovbe eax eax -- dummy
+ emit invalid = error $ "insn not implemented yet: " ++ (show invalid)
cArgs x = (8 + 4 * (fromIntegral x))
cArgs_ x = (8 + 4 * case x of I0 -> 0; I1 -> 1; I2 -> 2; I3 -> 3)