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>
116 lines
3.1 KiB
C++
116 lines
3.1 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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#include "loadimage.hh"
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namespace ghidra {
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/// This is a convenience method wrapped around the core
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/// loadFill() routine. It automatically allocates an array
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/// of the desired size, and then fills it with load image data.
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/// If the array cannot be allocated, an exception is thrown.
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/// The caller assumes the responsibility of freeing the
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/// array after it has been used.
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/// \param size is the number of bytes to read from the image
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/// \param addr is the address of the first byte being read
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/// \return a pointer to the desired bytes
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uint1 *LoadImage::load(int4 size,const Address &addr)
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{
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uint1 *buf = new uint1[ size ];
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if (buf == (uint1 *)0)
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throw LowlevelError("Out of memory");
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loadFill(buf,size,addr);
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return buf;
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}
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RawLoadImage::RawLoadImage(const string &f) : LoadImage(f)
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{
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vma = 0;
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thefile = (ifstream *)0;
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spaceid = (AddrSpace *)0;
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filesize = 0;
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}
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RawLoadImage::~RawLoadImage(void)
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{
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if (thefile != (ifstream *)0) {
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thefile->close();
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delete thefile;
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}
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}
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/// The file is opened and its size immediately recovered.
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void RawLoadImage::open(void)
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{
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if (thefile != (ifstream *)0) throw LowlevelError("loadimage is already open");
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thefile = new ifstream(filename.c_str());
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if (!(*thefile)) {
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string errmsg = "Unable to open raw image file: "+filename;
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throw LowlevelError(errmsg);
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}
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thefile->seekg(0,ios::end);
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filesize = thefile->tellg();
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}
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string RawLoadImage::getArchType(void) const
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{
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return "unknown";
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}
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void RawLoadImage::adjustVma(long adjust)
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{
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adjust = AddrSpace::addressToByte(adjust,spaceid->getWordSize());
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vma += adjust;
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}
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void RawLoadImage::loadFill(uint1 *ptr,int4 size,const Address &addr)
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{
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uintb curaddr = addr.getOffset();
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uintb offset = 0;
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uintb readsize;
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curaddr -= vma; // Get relative offset of first byte
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while(size>0) {
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if (curaddr >= filesize) {
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if (offset == 0) // Initial address not within file
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break;
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memset(ptr+offset,0,size); // Fill out the rest of the buffer with 0
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return;
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}
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readsize = size;
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if (curaddr + readsize > filesize) // Adjust to biggest possible read
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readsize = filesize - curaddr;
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thefile->seekg(curaddr);
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thefile->read((char *)(ptr+offset),readsize);
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offset += readsize;
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size -= readsize;
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curaddr += readsize;
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}
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if (size > 0) {
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ostringstream errmsg;
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errmsg << "Unable to load " << dec << size << " bytes at " << addr.getShortcut();
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addr.printRaw(errmsg);
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throw DataUnavailError(errmsg.str());
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}
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}
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} // End namespace ghidra
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