import ClosureInfo ( mkVirtHeapOffsets )
import FastString ( FastString(..) )
-import Foreign ( Storable(..), Word8, Word16, Word32, Ptr(..),
+import Foreign ( Storable(..), Word8, Word16, Word32, Word64, Ptr(..),
malloc, castPtr, plusPtr, Addr )
import Addr ( addrToInt )
import Bits ( Bits(..), shiftR )
import PrelBase ( Int(..) )
import PrelIOBase ( IO(..) )
+import Monad ( liftM )
+
\end{code}
%************************************************************************
nptrs = fromIntegral nptrs_really,
tipe = fromIntegral cONSTR,
srtlen = fromIntegral conNo,
- code0 = fromIntegral code0, code1 = fromIntegral code1,
- code2 = fromIntegral code2, code3 = fromIntegral code3,
- code4 = fromIntegral code4, code5 = fromIntegral code5,
- code6 = fromIntegral code6, code7 = fromIntegral code7,
- code8 = fromIntegral code8, code9 = fromIntegral code9,
- codeA = fromIntegral codeA, codeB = fromIntegral codeB,
- codeC = fromIntegral codeC, codeD = fromIntegral codeD,
- codeE = fromIntegral codeE, codeF = fromIntegral codeF
+ code = code
}
-- Make a piece of code to jump to "entry_label".
-- This is the only arch-dependent bit.
- [code0,code1,code2,code3,code4,code5,code6,code7,
- code8,code9,codeA,codeB,codeC,codeD,codeE,codeF]
- = mkJumpToAddr entry_addr
+ code = mkJumpToAddr entry_addr
in
do addr <- malloc
--putStrLn ("SIZE of itbl is " ++ show (sizeOf itbl))
-- Make code which causes a jump to the given address. This is the
-- only arch-dependent bit of the itbl story. The returned list is
--- 16 elements long, since on sparc 4 words (i.e. 4 insns) are needed.
+-- itblCodeLength elements (bytes) long.
-- For sparc_TARGET_ARCH, i386_TARGET_ARCH, etc.
#include "nativeGen/NCG.h"
-mkJumpToAddr :: Addr -> [Word8]
+itblCodeLength :: Int
+itblCodeLength = length (mkJumpToAddr undefined)
+
+mkJumpToAddr :: Addr -> [ItblCode]
#if sparc_TARGET_ARCH
-- After some consideration, we'll try this, where
-- 0008 81C0C000 jmp %g3
-- 000c 01000000 nop
+type ItblCode = Word32
mkJumpToAddr a
= let w32 = fromIntegral (addrToInt a)
- insn1 = 0x07000000 .|. (hi22 w32)
- insn2 = 0x8610E000 .|. (lo10 w32)
- insn3 = 0x81C0C000
- insn4 = 0x01000000
-
- -- big-endianly ...
- w2bytes :: Word32 -> [Word8]
- w2bytes w
- = map fromIntegral [byte 3 w, byte 2 w, byte 1 w, byte 0 w]
hi22, lo10 :: Word32 -> Word32
lo10 x = x .&. 0x3FF
hi22 x = (x `shiftR` 10) .&. 0x3FFFF
-
- insnBytes
- = concat (map w2bytes [insn1, insn2, insn3, insn4])
- in
- insnBytes
+
+ in [ 0x07000000 .|. (hi22 w32),
+ 0x8610E000 .|. (lo10 w32),
+ 0x81C0C000,
+ 0x01000000 ]
#endif
#if i386_TARGET_ARCH
-- Generate movl $0xWWXXYYZZ,%eax ; jmp *%eax
-- which is
-- B8 ZZ YY XX WW FF E0
+
+type ItblCode = Word8
mkJumpToAddr a
= let w32 = fromIntegral (addrToInt a)
insnBytes :: [Word8]
insnBytes
- = map fromIntegral (take 16 (
- [0xB8, byte 0 w32, byte 1 w32,
- byte 2 w32, byte 3 w32,
- 0xFF, 0xE0]
- ++ let nops = 0x90 : nops in nops
- ))
+ = [0xB8, byte 0 w32, byte 1 w32,
+ byte 2 w32, byte 3 w32,
+ 0xFF, 0xE0]
in
insnBytes
#endif
+#if alpha_TARGET_ARCH
+type ItblCode = Word32
+mkJumpToAddr a
+ = [ 0xc3800000 -- br at, .+4
+ , 0xa79c000c -- ldq at, 12(at)
+ , 0x6bfc0000 -- jmp (at) # with zero hint -- oh well
+ , 0x47ff041f -- nop
+ , fromIntegral (w64 .&. 0x0000FFFF)
+ , fromIntegral ((w64 `shiftR` 32) .&. 0x0000FFFF) ]
+ where w64 = fromIntegral (addrToInt a) :: Word64
+#endif
+
-byte :: Int -> Word32 -> Word32
-byte 0 w = w .&. 0xFF
-byte 1 w = (w `shiftR` 8) .&. 0xFF
-byte 2 w = (w `shiftR` 16) .&. 0xFF
-byte 3 w = (w `shiftR` 24) .&. 0xFF
+byte :: Int -> Word32 -> Word8
+byte 0 w = fromIntegral (w .&. 0xFF)
+byte 1 w = fromIntegral ((w `shiftR` 8) .&. 0xFF)
+byte 2 w = fromIntegral ((w `shiftR` 16) .&. 0xFF)
+byte 3 w = fromIntegral ((w `shiftR` 24) .&. 0xFF)
vecret_entry 0 = stg_interp_constr1_entry
-- Ultra-minimalist version specially for constructors
+#if SIZEOF_VOID_P == 8
+type HalfWord = Word32
+#else
+type HalfWord = Word16
+#endif
+
data StgInfoTable = StgInfoTable {
- ptrs :: Word16,
- nptrs :: Word16,
- srtlen :: Word16,
- tipe :: Word16,
- code0, code1, code2, code3, code4, code5, code6, code7,
- code8, code9, codeA, codeB, codeC, codeD, codeE, codeF :: Word8
+ ptrs :: HalfWord,
+ nptrs :: HalfWord,
+ tipe :: HalfWord,
+ srtlen :: HalfWord,
+ code :: [ItblCode]
}
-
instance Storable StgInfoTable where
sizeOf itbl
- = (sum . map (\f -> f itbl))
- [fieldSz ptrs, fieldSz nptrs, fieldSz srtlen, fieldSz tipe,
- fieldSz code0, fieldSz code1, fieldSz code2, fieldSz code3,
- fieldSz code4, fieldSz code5, fieldSz code6, fieldSz code7,
- fieldSz code8, fieldSz code9, fieldSz codeA, fieldSz codeB,
- fieldSz codeC, fieldSz codeD, fieldSz codeE, fieldSz codeF]
+ = sum
+ [fieldSz ptrs itbl,
+ fieldSz nptrs itbl,
+ fieldSz tipe itbl,
+ fieldSz srtlen itbl,
+ fieldSz (head.code) itbl * itblCodeLength]
alignment itbl
- = (sum . map (\f -> f itbl))
- [fieldAl ptrs, fieldAl nptrs, fieldAl srtlen, fieldAl tipe,
- fieldAl code0, fieldAl code1, fieldAl code2, fieldAl code3,
- fieldAl code4, fieldAl code5, fieldAl code6, fieldAl code7,
- fieldAl code8, fieldAl code9, fieldAl codeA, fieldAl codeB,
- fieldAl codeC, fieldAl codeD, fieldAl codeE, fieldAl codeF]
+ = SIZEOF_VOID_P
poke a0 itbl
- = do a1 <- store (ptrs itbl) (castPtr a0)
- a2 <- store (nptrs itbl) a1
- a3 <- store (tipe itbl) a2
- a4 <- store (srtlen itbl) a3
- a5 <- store (code0 itbl) a4
- a6 <- store (code1 itbl) a5
- a7 <- store (code2 itbl) a6
- a8 <- store (code3 itbl) a7
- a9 <- store (code4 itbl) a8
- aA <- store (code5 itbl) a9
- aB <- store (code6 itbl) aA
- aC <- store (code7 itbl) aB
- aD <- store (code8 itbl) aC
- aE <- store (code9 itbl) aD
- aF <- store (codeA itbl) aE
- a10 <- store (codeB itbl) aF
- a11 <- store (codeC itbl) a10
- a12 <- store (codeD itbl) a11
- a13 <- store (codeE itbl) a12
- a14 <- store (codeF itbl) a13
- return ()
+ = runState (castPtr a0)
+ $ do store (ptrs itbl)
+ store (nptrs itbl)
+ store (tipe itbl)
+ store (srtlen itbl)
+ sequence_ (map store (code itbl))
peek a0
- = do (a1, ptrs) <- load (castPtr a0)
- (a2, nptrs) <- load a1
- (a3, tipe) <- load a2
- (a4, srtlen) <- load a3
- (a5, code0) <- load a4
- (a6, code1) <- load a5
- (a7, code2) <- load a6
- (a8, code3) <- load a7
- (a9, code4) <- load a8
- (aA, code5) <- load a9
- (aB, code6) <- load aA
- (aC, code7) <- load aB
- (aD, code8) <- load aC
- (aE, code9) <- load aD
- (aF, codeA) <- load aE
- (a10,codeB) <- load aF
- (a11,codeC) <- load a10
- (a12,codeD) <- load a11
- (a13,codeE) <- load a12
- (a14,codeF) <- load a13
+ = runState (castPtr a0)
+ $ do ptrs <- load
+ nptrs <- load
+ tipe <- load
+ srtlen <- load
+ code <- sequence (replicate itblCodeLength load)
return
StgInfoTable {
- ptrs = ptrs, nptrs = nptrs,
- srtlen = srtlen, tipe = tipe,
- code0 = code0, code1 = code1, code2 = code2, code3 = code3,
- code4 = code4, code5 = code5, code6 = code6, code7 = code7,
- code8 = code8, code9 = code9, codeA = codeA, codeB = codeB,
- codeC = codeC, codeD = codeD, codeE = codeE, codeF = codeF
+ ptrs = ptrs,
+ nptrs = nptrs,
+ tipe = tipe,
+ srtlen = srtlen,
+ code = code
}
fieldSz :: (Storable a, Storable b) => (a -> b) -> a -> Int
fieldSz sel x = sizeOf (sel x)
-fieldAl :: (Storable a, Storable b) => (a -> b) -> a -> Int
-fieldAl sel x = alignment (sel x)
+newtype State s m a = State (s -> m (s, a))
+
+instance Monad m => Monad (State s m) where
+ return a = State (\s -> return (s, a))
+ State m >>= k = State (\s -> m s >>= \(s', a) -> case k a of State n -> n s')
+ fail str = State (\s -> fail str)
+
+class (Monad m, Monad (t m)) => MonadT t m where
+ lift :: m a -> t m a
+
+instance Monad m => MonadT (State s) m where
+ lift m = State (\s -> m >>= \a -> return (s, a))
+
+runState :: (Monad m) => s -> State s m a -> m a
+runState s (State m) = m s >>= return . snd
+
+type PtrIO = State (Ptr Word8) IO
+
+advance :: Storable a => PtrIO (Ptr a)
+advance = State adv where
+ adv addr = case castPtr addr of { addrCast -> return
+ (addr `plusPtr` sizeOfPointee addrCast, addrCast) }
+
+sizeOfPointee :: (Storable a) => Ptr a -> Int
+sizeOfPointee addr = sizeOf (typeHack addr)
+ where typeHack = undefined :: Ptr a -> a
-store :: Storable a => a -> Ptr a -> IO (Ptr b)
-store x addr = do poke addr x
- return (castPtr (addr `plusPtr` sizeOf x))
+store :: Storable a => a -> PtrIO ()
+store x = do addr <- advance
+ lift (poke addr x)
-load :: Storable a => Ptr a -> IO (Ptr b, a)
-load addr = do x <- peek addr
- return (castPtr (addr `plusPtr` sizeOf x), x)
+load :: Storable a => PtrIO a
+load = do addr <- advance
+ lift (peek addr)
\end{code}
projects / ghc-hetmet.git / commitdiff