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In CAPSTONE_DIET builds, getRegisterName() returns NULL because the
register-name string table is compiled out. Every other AArch64 printer
helper feeds that NULL into SStream_concat0(), which is a no-op on NULL
under CAPSTONE_DIET. printMatrixTileVector is the outlier: it calls
strlen(RegName) + 1 directly to size a scratch buffer, so a NULL
result causes SIGSEGV inside strlen().
Early-return after AArch64_add_cs_detail_1() when RegName is NULL, so
detail-mode users still get the operand recorded.
Repro on a diet aarch64 build:
static const unsigned char code[] = { 0xc0, 0xc0, 0xc0, 0xc0 };
cs_disasm(handle, code, sizeof(code), 0, 0, &insn); /* SIGSEGV */
Fixes capstone-engine/capstone#3014
Co-authored-by: Amit Sides <amit-sides@users.noreply.github.com>
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| CONTRIBUTING.md | ||
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| Mapping.h | ||
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| MCDisassembler.h | ||
| MCFixedLenDisassembler.h | ||
| MCInst.c | ||
| MCInst.h | ||
| MCInstPrinter.c | ||
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| MCInstrDesc.h | ||
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| README.md | ||
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| SStream.c | ||
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Capstone Engine
Tip
Welcome to join our community group!
Capstone is a disassembly framework with the target of becoming the ultimate disasm engine for binary analysis and reversing in the security community.
Created by Nguyen Anh Quynh, then developed and maintained by a small community, Capstone offers some unparalleled features:
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Support multiple hardware architectures: ARM, AArch64, Alpha, ARC, BPF, Ethereum VM, LoongArch, HP PA-RISC (HPPA), M68K, M680X, Mips, MOS65XX, PPC, RISC-V(rv32G/rv64G), SH, Sparc, SystemZ, TMS320C64X, TriCore, Webassembly, XCore and X86 (16, 32, 64), Xtensa.
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Having clean/simple/lightweight/intuitive architecture-neutral API.
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Provide details on disassembled instruction (called “decomposer” by others).
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Provide semantics of the disassembled instruction, such as list of implicit registers read & written.
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Implemented in pure C language, with lightweight bindings for Swift, D, Clojure, F#, Common Lisp, Visual Basic, PHP, PowerShell, Emacs, Haskell, Perl, Python, Ruby, C#, NodeJS, Java, GO, C++, OCaml, Lua, Rust, Delphi, Free Pascal & Vala ready either in main code, or provided externally by the community).
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Native support for all popular platforms: Windows, Mac OSX, iOS, Android, Linux, *BSD, Solaris, etc.
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Thread-safe by design.
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Special support for embedding into firmware or OS kernel.
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High performance & suitable for malware analysis (capable of handling various X86 malware tricks).
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Distributed under the open source BSD license.
Further information is available at https://www.capstone-engine.org
Compile
See BUILDING.md file for how to compile and install Capstone.
Documentation
- Useful links and tutorials: docs/README
- Software architecture overview: docs/ARCHITECTURE.md
- Testing documentation: tests/README.md
- Updater (Auto-Sync) documentation: suite/auto-sync/README.md
Contributing
See CONTRIBUTING.md for an intro.
Fuzz
See suite/fuzz/README.md for more information.
License
This project is released under the BSD license. If you redistribute the binary or source code of Capstone, please attach file LICENSE.TXT with your products.