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Code Issues Releases Wiki Activity

GP-1518 Decompiler support for unions

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caheckman 2021-11-19 14:39:42 -05:00
parent 53e2c4dc4f
commit 3fdbbbb231
65 changed files with 5119 additions and 1068 deletions
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10
Ghidra/Features/Decompiler/src/decompile/cpp/funcdata.hh
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@ -24,6 +24,7 @@
#include "heritage.hh"
#include "merge.hh"
#include "dynamic.hh"
#include "unionresolve.hh"
class FlowInfo;
@ -88,6 +89,7 @@ class Funcdata {
ParamActive *activeoutput; ///< Data for assessing which parameters are passed to \b this function
Override localoverride; ///< Overrides of data-flow, prototypes, etc. that are local to \b this function
map<VarnodeData,const LanedRegister *> lanedMap; ///< Current storage locations which may be laned registers
map<ResolveEdge,ResolvedUnion> unionMap; ///< A map from data-flow edges to the resolved field of TypeUnion being accessed
// Low level Varnode functions
void setVarnodeProperties(Varnode *vn) const; ///< Look-up boolean properties and data-type information
@ -100,6 +102,7 @@ class Funcdata {
Varnode *cloneVarnode(const Varnode *vn); ///< Clone a Varnode (between copies of the function)
void destroyVarnode(Varnode *vn); ///< Delete the given Varnode from \b this function
void coverVarnodes(SymbolEntry *entry,vector<Varnode *> &list);
bool applyUnionFacet(SymbolEntry *entry,DynamicHash &dhash);
// Low level op functions
void opZeroMulti(PcodeOp *op); ///< Transform trivial CPUI_MULTIEQUAL to CPUI_COPY
// Low level block functions
@ -373,6 +376,7 @@ public:
bool onlyOpUse(const Varnode *invn,const PcodeOp *opmatch,const ParamTrial &trial,uint4 mainFlags) const;
bool ancestorOpUse(int4 maxlevel,const Varnode *invn,const PcodeOp *op,ParamTrial &trial,uint4 mainFlags) const;
bool syncVarnodesWithSymbols(const ScopeLocal *lm,bool typesyes);
Datatype *checkSymbolType(Varnode *vn); ///< Check for any delayed symbol data-type information on the given Varnode
void transferVarnodeProperties(Varnode *vn,Varnode *newVn,int4 lsbOffset);
bool fillinReadOnly(Varnode *vn); ///< Replace the given Varnode with its (constant) value in the load image
bool replaceVolatile(Varnode *vn); ///< Replace accesses of the given Varnode with \e volatile operations
@ -489,6 +493,12 @@ public:
bool moveRespectingCover(PcodeOp *op,PcodeOp *lastOp); ///< Move given op past \e lastOp respecting covers if possible
const ResolvedUnion *getUnionField(const Datatype *parent,const PcodeOp *op,int4 slot) const;
bool setUnionField(const Datatype *parent,const PcodeOp *op,int4 slot,const ResolvedUnion &resolve);
void forceFacingType(Datatype *parent,int4 fieldNum,PcodeOp *op,int4 slot);
void inheritReadResolution(const PcodeOp *op,int4 slot,PcodeOp *oldOp,int4 oldSlot);
int4 inheritWriteResolution(Datatype *parent,const PcodeOp *op,PcodeOp *oldOp);
// Jumptable routines
JumpTable *linkJumpTable(PcodeOp *op); ///< Link jump-table with a given BRANCHIND
JumpTable *findJumpTable(const PcodeOp *op) const; ///< Find a jump-table associated with a given BRANCHIND