Go to file
flobernd 39369269e8 Fixed formatting bug in ZydisInfo tool 2017-07-24 22:03:41 +02:00
assets/PinTestTool Removed old instruction-editor 2017-07-24 21:37:58 +02:00
examples Moved ZydisFuzzIn and ZydisPerfTest to examples 2017-07-24 21:59:54 +02:00
include/Zydis Various changes to the instruction-definitions and decoder/encoder-tables 2017-07-19 18:43:59 +02:00
src Various changes to the instruction-definitions and decoder/encoder-tables 2017-07-19 18:43:59 +02:00
tools Fixed formatting bug in ZydisInfo tool 2017-07-24 22:03:41 +02:00
.gitignore Moved private headers to `src` directory 2017-07-03 04:16:38 +02:00
CMakeLists.txt Moved ZydisFuzzIn and ZydisPerfTest to examples 2017-07-24 21:59:54 +02:00
LICENSE Updated license 2017-07-04 16:22:51 +02:00
README.md Updated README file 2017-07-24 21:40:59 +02:00

README.md

Zyan Disassembler Engine (Zydis)

License: MIT Gitter

Fast and lightweight x86/x86-64 disassembler library.

Features

  • Supports all x86 and x86-64 (AMD64) general-purpose and system instructions.
  • Supports pretty much all ISA extensions:
    • FPU (x87), MMX
    • SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AESNI
    • AVX, AVX2, AVX512BW, AVX512CD, AVX512DQ, AVX512ER, AVX512F, AVX512PF, AVX512VL
    • ADX, BMI1, BMI2, FMA, FMA4
    • ..
  • Optimized for high performance
  • No dynamic memory allocation
    • Perfect for kernel-mode drivers and embedded devices
  • Very small file-size overhead compared to other common disassembler libraries
  • Complete doxygen documentation

Quick Example

The following example program uses Zydis to disassemble a given memory buffer and prints the output to the console.

#include <stdio.h>
#include <Zydis/Zydis.h>

int main()
{
    uint8_t data[] =
    {
        0x51, 0x8D, 0x45, 0xFF, 0x50, 0xFF, 0x75, 0x0C, 0xFF, 0x75, 
        0x08, 0xFF, 0x15, 0xA0, 0xA5, 0x48, 0x76, 0x85, 0xC0, 0x0F, 
        0x88, 0xFC, 0xDA, 0x02, 0x00
    };

    ZydisDecoder decoder;
    ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_64, ZYDIS_ADDRESS_WIDTH_64);

    ZydisFormatter formatter;
    ZydisFormatterInitEx(&formatter, ZYDIS_FORMATTER_STYLE_INTEL,
        ZYDIS_FMTFLAG_FORCE_SEGMENTS | ZYDIS_FMTFLAG_FORCE_OPERANDSIZE,
        ZYDIS_FORMATTER_ADDR_ABSOLUTE, ZYDIS_FORMATTER_DISP_DEFAULT, ZYDIS_FORMATTER_IMM_DEFAULT);
  
    uint64_t instructionPointer = 0x007FFFFFFF400000;

    ZydisDecodedInstruction instruction;
    char buffer[256];
    while (ZYDIS_SUCCESS(
        ZydisDecoderDecodeBuffer(decoder, data, length, instructionPointer, &instruction)))
    {
        data += instruction.length;
        length -= instruction.length;
        instructionPointer += instruction.length;
        printf("%016" PRIX64 "  ", instruction.instrAddress);
        ZydisFormatterFormatInstruction(&formatter, &instruction, &buffer[0], sizeof(buffer));  
        printf(" %s\n", &buffer[0]);
    }
}

Sample Output

The above example program generates the following output:

007FFFFFFF400000   push rcx
007FFFFFFF400001   lea eax, dword ptr ss:[rbp-0x01]
007FFFFFFF400004   push rax
007FFFFFFF400005   push qword ptr ss:[rbp+0x0C]
007FFFFFFF400008   push qword ptr ss:[rbp+0x08]
007FFFFFFF40000B   call qword ptr ds:[0x008000007588A5B1]
007FFFFFFF400011   test eax, eax
007FFFFFFF400013   js 0x007FFFFFFF42DB15

Compilation

Zydis builds cleanly on most platforms without any external dependencies. You can use CMake to generate project files for your favorite C99 compiler.

Roadmap

  • Language bindings
  • Tests
  • Encoding support
  • Graphical editor for the instruction-database

License

Zyan Disassembler Engine is licensed under the MIT License. Dependencies are under their respective licenses.