5152d0c9f7
Foundation for replacing fold's dead/abstract binary encoder with a real
SSA P-Code frontend. Verified root-cause gap: serializeBinaryIR() emits only
data-discovery nodes (sections/strings/imports/exports); the control-flow
BinaryExprKind values (BasicBlock/CallSite/...) are never constructed, so the
Z3-BB encoder's encodable filter is always empty and encodeBinaryBBs never
runs — hence 0 binary Z3 findings. The P-Code pipeline supersedes that path.
Phase 0 — docs/internal/ghidra-pcode-integration-research.md: P-Code opcode
core, the decompiler C++ embedding API (LoadImage/SleighArchitecture/Funcdata),
the CORE+DECCORE+SLEIGH source sets, no-bison finding, and pypcode as build
reference.
Phase 1 — vendored Ghidra decompiler at pinned commit (Ghidra_12.1_build,
7e89d94e34...) under third_party/ghidra-decompiler/ (cpp + AArch64 specs +
Apache-2.0 LICENSE + VENDOR.md + .gitignore for build artifacts). Validated by
hand on this clang-21/macOS toolchain:
- full SSA engine (CORE+DECCORE+SLEIGH, 80 files incl. heritage/funcdata/
action) compiles clean, -std=c++11 -O2, NO BFD, NO bison (generated
parsers are committed upstream; ruleparse isn't in the lib set);
- sleigh compiler builds; AArch64 .slaspec -> .sla compiles;
- tools/pcode_dump.cpp (custom LoadImage, no BFD) lifts the real arm64
sym._div_by_zero_direct to correct P-Code: `mov w9,#0 -> COPY(const 0)`,
`sdiv -> INT_SDIV(w8,w9)` — divisor zero-ness explicit in the data flow,
so the Phase-3 encoder proves div-by-zero trivially, multi-arch.
Not yet meson-wired (next step) and no fold-side IR/encoder yet (Phase 2-3);
this commit is the validated vendor + smoke tool.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
94 lines
5 KiB
C++
94 lines
5 KiB
C++
/* ###
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* IP: GHIDRA
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/// \file sleighbase.hh
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/// \brief Base class for applications that process SLEIGH format specifications
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#ifndef __SLEIGHBASE_HH__
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#define __SLEIGHBASE_HH__
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#include "translate.hh"
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#include "slaformat.hh"
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#include "slghsymbol.hh"
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namespace ghidra {
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/// \brief class for recording source file information for SLEIGH constructors.
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///
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/// A SLEIGH specification may contain many source files. This class is
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/// used to associate each constructor in a SLEIGH language to the source
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/// file where it is defined. This information is useful when debugging
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/// SLEIGH specifications. Sourcefiles are assigned a numeric index and
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/// the mapping from indices to filenames is written to the generated .sla
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/// file. For each constructor, the data written to the .sla file includes
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/// the source file index.
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class SourceFileIndexer {
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public:
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SourceFileIndexer() {leastUnusedIndex = 0;}
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~SourceFileIndexer(void) { }
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///Returns the index of the file. If the file is not in the index it is added.
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int4 index(const string filename);
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int4 getIndex(const string); ///< get the index of a file. Error if the file is not in the index.
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string getFilename(int4); ///< get the filename corresponding to an index
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void decode(Decoder &decoder); ///< decode a stored index mapping from a stream
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void encode(Encoder &encoder) const; ///< Encode the index mapping to stream
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private:
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int4 leastUnusedIndex; ///< one-up count for assigning indices to files
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map<int4, string> indexToFile; ///< map from indices to files
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map<string, int4> fileToIndex; ///< map from files to indices
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};
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/// \brief Common core of classes that read or write SLEIGH specification files natively.
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///
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/// This class represents what's in common across the SLEIGH infrastructure between:
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/// - Reading the various SLEIGH specification files
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/// - Building and writing out SLEIGH specification files
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class SleighBase : public Translate {
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vector<string> userop; ///< Names of user-define p-code ops for \b this Translate object
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map<VarnodeData,string> varnode_xref; ///< A map from Varnodes in the \e register space to register names
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protected:
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SubtableSymbol *root; ///< The root SLEIGH decoding symbol
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SymbolTable symtab; ///< The SLEIGH symbol table
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uint4 maxdelayslotbytes; ///< Maximum number of bytes in a delay-slot directive
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uint4 unique_allocatemask; ///< Bits that are guaranteed to be zero in the unique allocation scheme
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uint4 numSections; ///< Number of \e named sections
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SourceFileIndexer indexer; ///< source file index used when generating SLEIGH constructor debug info
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void buildXrefs(vector<string> &errorPairs); ///< Build register map. Collect user-ops and context-fields.
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void reregisterContext(void); ///< Reregister context fields for a new executable
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AddrSpace *decodeSlaSpace(Decoder &decoder,const Translate *trans); ///< Add a space parsed from a .sla file
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void decodeSlaSpaces(Decoder &decoder,const Translate *trans); ///< Restore address spaces from a .sla file
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void decode(Decoder &decoder); /// Decode a SELIGH specification from a stream
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public:
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static const uint4 MAX_UNIQUE_SIZE; ///< Maximum size of a varnode in the unique space (should match value in SleighBase.java)
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SleighBase(void); ///< Construct an uninitialized translator
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bool isInitialized(void) const { return (root != (SubtableSymbol *)0); } ///< Return \b true if \b this is initialized
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virtual ~SleighBase(void) {} ///< Destructor
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virtual const VarnodeData &getRegister(const string &nm) const;
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virtual string getRegisterName(AddrSpace *base,uintb off,int4 size) const;
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virtual string getExactRegisterName(AddrSpace *base,uintb off,int4 size) const;
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virtual void getAllRegisters(map<VarnodeData,string> ®list) const;
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virtual void getUserOpNames(vector<string> &res) const;
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SleighSymbol *findSymbol(const string &nm) const { return symtab.findSymbol(nm); } ///< Find a specific SLEIGH symbol by name in the current scope
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SleighSymbol *findSymbol(uintm id) const { return symtab.findSymbol(id); } ///< Find a specific SLEIGH symbol by id
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SleighSymbol *findGlobalSymbol(const string &nm) const { return symtab.findGlobalSymbol(nm); } ///< Find a specific global SLEIGH symbol by name
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void encodeSlaSpace(Encoder &encoder,AddrSpace *spc) const; ///< Write the details of given space in .sla format
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void encode(Encoder &encoder) const; ///< Write out the SLEIGH specification as a \<sleigh> tag.
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};
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} // End namespace ghidra
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#endif
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