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Use a ConstraintKind to simplify a number of constraint contexts

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This commit is contained in:
Tristan Ravitch 2017-10-03 18:05:46 -07:00
parent adf8a46f91
commit c751e02e6c
2 changed files with 12 additions and 11 deletions
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12
macaw-ppc/src/Data/Macaw/PPC/Disassemble.hs
View File

@ -68,7 +68,7 @@ readInstruction mem addr = MM.addrWidthClass (MM.memAddrWidth mem) $ do
Nothing -> ET.throwError (MM.InvalidInstruction (MM.relativeSegmentAddr addr) contents)
disassembleBlock :: forall ppc s
. (ArchWidth ppc, ArchReg ppc ~ PPCReg ppc, MM.MemWidth (ArchAddrWidth ppc))
. (PPCWidth ppc)
=> (Value ppc s (BVType (ArchAddrWidth ppc)) -> D.Instruction -> Maybe (PPCGenerator ppc s ()))
-> MM.Memory (ArchAddrWidth ppc)
-> GenState ppc s
@ -81,9 +81,6 @@ disassembleBlock lookupSemantics mem gs curIPAddr maxOffset = do
case readInstruction mem curIPAddr of
Left err -> failAt gs off curIPAddr (DecodeError err)
Right (i, bytesRead) -> do
-- let nextIP = MM.relativeAddr seg (off + bytesRead)
-- let nextIPVal = MC.RelocatableValue undefined nextIP
-- Note: In PowerPC, the IP is incremented *after* an instruction
-- executes, rather than before as in X86. We have to pass in the
-- physical address of the instruction here.
@ -93,9 +90,6 @@ disassembleBlock lookupSemantics mem gs curIPAddr maxOffset = do
case lookupSemantics ipVal i of
Nothing -> failAt gs off curIPAddr (UnsupportedInstruction i)
Just transformer -> do
-- FIXME: Do we need to add failure modes here? Probably. There are
-- some invalid encodings that we could encounter that would be worth
-- failing for.
egs1 <- liftST $ execGenerator gs $ do
let line = printf "%s: %s" (show curIPAddr) (show (D.ppInstruction i))
addStmt (Comment (T.pack line))
@ -104,7 +98,7 @@ disassembleBlock lookupSemantics mem gs curIPAddr maxOffset = do
Left genErr -> failAt gs off curIPAddr (GenerationError i genErr)
Right gs1 -> undefined
tryDisassembleBlock :: (ArchWidth ppc, ArchReg ppc ~ PPCReg ppc, MM.MemWidth (ArchAddrWidth ppc), KnownNat (RegAddrWidth (PPCReg ppc)))
tryDisassembleBlock :: (PPCWidth ppc)
=> (Value ppc s (BVType (ArchAddrWidth ppc)) -> D.Instruction -> Maybe (PPCGenerator ppc s ()))
-> MM.Memory (ArchAddrWidth ppc)
-> NC.NonceGenerator (ST s) s
@ -126,7 +120,7 @@ tryDisassembleBlock lookupSemantics mem nonceGen startAddr maxSize = do
--
-- Return a list of disassembled blocks as well as the total number of bytes
-- occupied by those blocks.
disassembleFn :: (ArchWidth ppc, ArchReg ppc ~ PPCReg ppc, MM.MemWidth (RegAddrWidth (ArchReg ppc)), KnownNat (RegAddrWidth (PPCReg ppc)))
disassembleFn :: (PPCWidth ppc)
=> proxy ppc
-> (Value ppc s (BVType (ArchAddrWidth ppc)) -> D.Instruction -> Maybe (PPCGenerator ppc s ()))
-- ^ A function to look up the semantics for an instruction. The

11
macaw-ppc/src/Data/Macaw/PPC/PPCReg.hs
View File

@ -1,3 +1,4 @@
{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GADTs #-}
@ -12,6 +13,7 @@
module Data.Macaw.PPC.PPCReg (
PPCReg(..),
linuxSystemCallPreservedRegisters,
PPCWidth,
ArchWidth(..)
) where
@ -99,8 +101,13 @@ instance (ArchWidth ppc) => HasRepr (PPCReg ppc) TypeRepr where
PPC_CTR -> BVTypeRepr (pointerNatRepr (Proxy @ppc))
PPC_CR -> BVTypeRepr n32
instance (MM.MemWidth w, ArchWidth ppc, w ~ MC.RegAddrWidth (PPCReg ppc), 1 <= w)
=> MC.RegisterInfo (PPCReg ppc) where
type PPCWidth ppc = (ArchWidth ppc,
MC.ArchReg ppc ~ PPCReg ppc,
MM.MemWidth (MC.RegAddrWidth (MC.ArchReg ppc)),
1 <= MC.RegAddrWidth (PPCReg ppc),
KnownNat (MC.RegAddrWidth (PPCReg ppc)))
instance (PPCWidth ppc) => MC.RegisterInfo (PPCReg ppc) where
archRegs = ppcRegs
sp_reg = PPC_GP (D.GPR 1)
ip_reg = PPC_IP