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Decompiler support for offset/relative pointers

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This commit is contained in:
caheckman 2021-10-05 16:46:19 -04:00
parent 513c9beb9d
commit cce187a4c5
18 changed files with 746 additions and 174 deletions
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14
Ghidra/Features/Decompiler/src/decompile/cpp/printc.hh
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@ -113,6 +113,7 @@ protected:
static OpToken ptr_expr; ///< Pointer adornment for a type declaration
static OpToken array_expr; ///< Array adornment for a type declaration
static OpToken enum_cat; ///< The \e concatenation operator for enumerated values
static const string typePointerRelToken; ///< The token to print indicating PTRSUB relative to a TypePointerRel
bool option_NULL; ///< Set to \b true if we should emit NULL keyword
bool option_inplace_ops; ///< Set to \b true if we should use '+=' '&=' etc.
bool option_convention; ///< Set to \b true if we should print calling convention
@ -196,6 +197,7 @@ protected:
virtual void emitFunctionDeclaration(const Funcdata *fd);
virtual void emitTypeDefinition(const Datatype *ct);
virtual bool checkPrintNegation(const Varnode *vn);
void pushTypePointerRel(const PcodeOp *op);
public:
PrintC(Architecture *g,const string &nm="c-language"); ///< Constructor
void setNULLPrinting(bool val) { option_NULL = val; } ///< Toggle the printing of a 'NULL' token
@ -313,4 +315,16 @@ public:
virtual void callback(EmitXml *emit);
};
/// \brief Push a token indicating a PTRSUB (a -> operator) is acting at an offset from the original pointer
///
/// When a variable has TypePointerRel as its data-type, PTRSUB acts relative to the \e parent
/// data-type. We print a specific token to indicate this relative shift is happening.
/// \param op is is the PTRSUB op
inline void PrintC::pushTypePointerRel(const PcodeOp *op)
{
pushOp(&function_call,op);
pushAtom(Atom(typePointerRelToken,optoken,EmitXml::funcname_color,op));
}
#endif