import Data.List
import qualified Data.Map as Map
import Foreign
+import Foreign.C.Types
import System.IO
import Control.Monad.Trans
runCodeGen cg uenv ustate =
runCodeGenWithConfig cg uenv ustate defaultCodeGenConfig
+foreign import ccall "static stdlib.h"
+ memalign :: CUInt -> CUInt -> IO (Ptr a)
+
+foreign import ccall "static sys/mman.h"
+ mprotect :: CUInt -> CUInt -> Int -> IO Int
+
-- | Like 'runCodeGen', but allows more control over the code
-- generation process. In addition to a code generator and a user
-- environment and state, a code generation configuration must be
runCodeGenWithConfig (CodeGen cg) uenv ustate conf =
do (buf, sze) <- case customCodeBuffer conf of
Nothing -> do let initSize = codeBufferSize conf
- arr <- mallocBytes initSize
+ let size = fromIntegral initSize
+ arr <- memalign 0x1000 size
+ -- 0x7 = PROT_{READ,WRITE,EXEC}
+ _ <- mprotect (fromIntegral $ ptrToIntPtr arr) size 0x7
return (arr, initSize)
Just (buf, sze) -> return (buf, sze)
let env = CodeGenEnv {tailContext = True}