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>
82 lines
2.8 KiB
C++
82 lines
2.8 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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#ifndef __PARAMID_HH__
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#define __PARAMID_HH__
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#include "funcdata.hh"
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namespace ghidra {
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extern ElementId ELEM_PARAMMEASURES; ///< Marshaling element \<parammeasures>
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extern ElementId ELEM_PROTO; ///< Marshaling element \<proto>
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extern ElementId ELEM_RANK; ///< Marshaling element \<rank>
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class ParamMeasure {
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public:
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enum ParamIDIO {
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INPUT = 0,
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OUTPUT = 1
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};
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enum ParamRank {
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BESTRANK = 1,
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DIRECTWRITEWITHOUTREAD = 1, //Output
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DIRECTREAD = 2, //Input. Must be same as DIRECTWRITEWITHREAD so that walkforward as part of walkbackward works
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// for detecting(not that DIRECTREAD is lower rank that DIRECTWRITEWITHOUTREAD)
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DIRECTWRITEWITHREAD = 2, //Output
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DIRECTWRITEUNKNOWNREAD = 3, //Output
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SUBFNPARAM = 4, //Input
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THISFNPARAM = 4, //Output
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SUBFNRETURN = 5, //Output
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THISFNRETURN = 5, //Input
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INDIRECT = 6, //Input or Output
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WORSTRANK = 7
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};
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struct WalkState {
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bool best;
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int4 depth;
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ParamRank terminalrank;
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};
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private:
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VarnodeData vndata;
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Datatype *vntype;
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ParamRank rank;
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ParamIDIO io;
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int4 numcalls;
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void walkforward( WalkState &state, PcodeOp *ignoreop, Varnode *vn );
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void walkbackward( WalkState &state, PcodeOp *ignoreop,Varnode *vn );
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void updaterank( ParamRank rank_in,bool best ) { rank = (best==true) ? min( rank, rank_in ) : max( rank, rank_in ); }
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public:
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ParamMeasure( const Address &addr, int4 sz, Datatype *dt, ParamIDIO io_in) {
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vndata.space=addr.getSpace(); vndata.offset=addr.getOffset(); vndata.size = sz; vntype=dt; io = io_in; rank=WORSTRANK; }
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void calculateRank(bool best,Varnode *basevn,PcodeOp *ignoreop);
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void encode( Encoder &encoder,ElementId &tag,bool moredetail ) const;
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void savePretty( ostream &s,bool moredetail ) const;
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int4 getMeasure(void) const { return (int4) rank; }
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};
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class ParamIDAnalysis
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{
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Funcdata *fd;
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list<ParamMeasure> InputParamMeasures;
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list<ParamMeasure> OutputParamMeasures;
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public:
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ParamIDAnalysis( Funcdata *fd_in, bool justproto );
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void encode( Encoder &encoder, bool moredetail ) const;
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void savePretty( ostream &s, bool moredetail ) const;
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};
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} // End namespace ghidra
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#endif //ifndef __PARAMID_HH__
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