import Data.BinaryState
import Data.Int
import Data.Maybe
+import Data.List (genericLength)
import qualified Data.Map as M
import qualified Data.ByteString.Lazy as B
import Control.Monad
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) >> emit8 (0x90 :: Word8)
+ 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)
when (methodHaveReturnValue cls cpidx) (push eax)
return $ Just (calladdr, StaticMethod l)
- invokeEpilog :: Word16 -> Word32 -> (Bool -> TrapCause) -> CodeGen e s (Maybe (Word32, TrapCause))
- invokeEpilog cpidx offset trapcause = do
+ 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
- call (Disp offset, eax)
+ -- 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)
- let imm8 = is8BitOffset offset
- return $ Just (calladdr + (if imm8 then 3 else 6), trapcause imm8)
+ -- 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 ((* ptrSize) $ 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)
- -- 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
- invokeEpilog cpidx offset (`InterfaceMethod` 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 ((* ptrSize) $ 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
- -- 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
- invokeEpilog cpidx offset (`VirtualMethod` mi)
+ emit' (INVOKEINTERFACE cpidx _) = virtualCall cpidx True
+ emit' (INVOKEVIRTUAL cpidx) = virtualCall cpidx False
emit' (PUTSTATIC cpidx) = do
pop eax
trapaddr <- getCurrentOffset
mov eax (Disp 0, eax) -- mtable of objectref
trapaddr <- getCurrentOffset
-- place something like `mov edx $mtable_of_objref' instead
- emit32 (0x9090ffff :: Word32) >> emit8 (0x90 :: Word8)
+ emit32 (0x9090ffff :: Word32); nop
cmp eax edx
sete al
movzxb eax al
let objname = buildClassID cls objidx
trapaddr <- getCurrentOffset
-- place something like `push $objsize' instead
- emit32 (0x9090ffff :: Word32) >> emit8 (0x90 :: Word8)
+ emit32 (0x9090ffff :: Word32); nop
callMalloc
-- 0x13371337 is just a placeholder; will be replaced with mtable ptr
mov (Disp 0, eax) (0x13371337 :: Word32)
s8_w32 :: Word8 -> Word32
s8_w32 w8 = fromIntegral s8
where s8 = fromIntegral w8 :: Int8
-
- is8BitOffset :: Word32 -> Bool
- is8BitOffset w32 = s32 < 128 && s32 > (-127)
- where s32 = fromIntegral w32 :: Int32
projects / mate.git / blobdiff