capstone skipdata, publish mnemonic rates

Dockerfile

@@ -2,12 +2,22 @@ FROM ubuntu:22.04
 ENV DEBIAN_FRONTEND noninteractive
 
 RUN apt-get update && apt-get install --yes \
-    python3-capstone \
+    build-essential \
+    git \
     python3-setuptools \
     python3-sqlalchemy \
     && apt-get clean
 
+RUN git clone -b next https://github.com/capstone-engine/capstone.git /capstone/
+WORKDIR /capstone/
+RUN sh /capstone/make.sh
+RUN sh /capstone/make.sh install
+
 COPY setup.py /app/
 COPY subdisassem /app/subdisassem/
 WORKDIR /app/
 RUN python3 setup.py install
+
+RUN useradd -m subdisassem
+WORKDIR /home/subdisassem
+ENV HOME /home/subdisassem

subdisassem/disassemble.py

@@ -32,6 +32,9 @@ import logging
 class _CapstoneBase:
     def __init__(self, payload: bytes, offset: int = 0):
         self.arch = self.__class__.__name__
+        self.capstone.skipdata = True
+        self.capstone.skipdata_setup = ("unknown", None, None)
+
         disassembly = list()
 
         for opcode in self.capstone.disasm(payload, offset):
@@ -66,65 +69,74 @@ class _CapstoneBase:
         opcodes = list()
 
         for opcode in self.disassembly:
-            opcodes.append(
-                [
-                    opcode.address,
-                    opcode.mnemonic,
-                    opcode.op_str,
-                    opcode.size,
-                ]
-            )
+            opcodes.append([opcode.address, opcode.mnemonic, opcode.op_str])
 
         return opcodes
 
+    @property
+    def rates(self) -> list:
+        mnemonics = list()
 
-class X86_intel(_CapstoneBase):
+        for opcode in self.disassembly:
+            mnemonics.append(opcode.mnemonic)
+
+        _rates = dict()
+
+        for mnemonic in set(mnemonics):
+            _rates[mnemonic] = mnemonics.count(mnemonic)
+
+        listed = sorted(((value, key) for (key, value) in _rates.items()), reverse=True)
+
+        return listed
+
+
+class x86_16(_CapstoneBase):
     capstone = Cs(CS_ARCH_X86, CS_MODE_16)
 
 
-class X86(_CapstoneBase):
+class x86_32(_CapstoneBase):
     capstone = Cs(CS_ARCH_X86, CS_MODE_32)
 
 
-class X86_64(_CapstoneBase):
+class x86_64(_CapstoneBase):
     capstone = Cs(CS_ARCH_X86, CS_MODE_64)
 
 
-class ARM(_CapstoneBase):
+class armv7(_CapstoneBase):
     capstone = Cs(CS_ARCH_ARM, CS_MODE_ARM)
 
 
-class Thumb(_CapstoneBase):
+class thumb2(_CapstoneBase):
     capstone = Cs(CS_ARCH_ARM, CS_MODE_THUMB)
 
 
-class ARM_64(_CapstoneBase):
+class aarch64(_CapstoneBase):
     capstone = Cs(CS_ARCH_ARM64, CS_MODE_ARM)
 
 
-class MIPS_32_eb(_CapstoneBase):
+class mips32(_CapstoneBase):
     capstone = Cs(CS_ARCH_MIPS, CS_MODE_MIPS32 + CS_MODE_BIG_ENDIAN)
 
 
-class MIPS_64_el(_CapstoneBase):
+class mips64_el(_CapstoneBase):
     capstone = Cs(CS_ARCH_MIPS, CS_MODE_MIPS64 + CS_MODE_LITTLE_ENDIAN)
 
 
-class PPC_64(_CapstoneBase):
+class ppc64(_CapstoneBase):
     capstone = Cs(CS_ARCH_PPC, CS_MODE_BIG_ENDIAN)
 
 
-class Sparc(_CapstoneBase):
+class sparc(_CapstoneBase):
     capstone = Cs(CS_ARCH_SPARC, CS_MODE_BIG_ENDIAN)
 
 
-class SparcV9(_CapstoneBase):
+class sparcv9(_CapstoneBase):
     capstone = Cs(CS_ARCH_SPARC, CS_MODE_BIG_ENDIAN + CS_MODE_V9)
 
 
-class SystemZ(_CapstoneBase):
+class systemz(_CapstoneBase):
     capstone = Cs(CS_ARCH_SYSZ, 0)
 
 
-class XCore(_CapstoneBase):
+class xcore(_CapstoneBase):
     capstone = Cs(CS_ARCH_XCORE, 0)

subdisassem/schema.py

@@ -20,6 +20,7 @@ class Disassembly(Base):
     arch = Column(String, nullable=False)
     checksum = Column(String, nullable=False)
     count = Column(Integer, nullable=False)
+    rates = Column(String, nullable=False)
     size = Column(Integer, nullable=False)
     offset = Column(Integer, nullable=False)
     opcodes = Column(String, nullable=False)
@@ -40,6 +41,7 @@ class Disassembly(Base):
             "id": self.id,
             "arch": self.arch,
             "count": self.count,
+            "rates": self.rates,
             "size": self.size,
             "offset": self.offset,
         }

subdisassem/scripts.py

@@ -5,19 +5,19 @@ from sqlalchemy import desc
 import logging
 
 from .disassemble import (
-    X86_intel,
-    X86,
-    X86_64,
-    ARM,
-    Thumb,
-    ARM_64,
-    MIPS_32_eb,
-    MIPS_64_el,
-    PPC_64,
-    Sparc,
-    SparcV9,
-    SystemZ,
-    XCore,
+    x86_16,
+    x86_32,
+    x86_64,
+    armv7,
+    thumb2,
+    aarch64,
+    mips32,
+    mips64_el,
+    ppc64,
+    sparc,
+    sparcv9,
+    systemz,
+    xcore,
 )
 
 from .schema import db_config, Disassembly
@@ -28,7 +28,9 @@ def subdisassem_script():
     parser.add_argument("-v", "--verbose", action="count", help="verbose logging")
     parser.add_argument("-b", "--bin-path", required=True)
     parser.add_argument("-l", "--log", action="store_true", help="log to file")
-    parser.add_argument("-f", "--fuzz", default=64, help="offset bruteforce max")
+    parser.add_argument(
+        "-f", "--fuzz", type=int, default=64, help="offset bruteforce max"
+    )
     args = parser.parse_args()
 
     args.bin_path = Path(args.bin_path)
@@ -72,19 +74,19 @@ def subdisassem_script():
     logging.info(f"sha1sum: {checksum}")
 
     archs = [
-        X86_intel,
-        X86,
-        X86_64,
-        ARM,
-        Thumb,
-        ARM_64,
-        MIPS_32_eb,
-        MIPS_64_el,
-        PPC_64,
-        Sparc,
-        SparcV9,
-        SystemZ,
-        XCore,
+        x86_16,
+        x86_32,
+        x86_64,
+        armv7,
+        thumb2,
+        aarch64,
+        mips32,
+        mips64_el,
+        ppc64,
+        sparc,
+        sparcv9,
+        systemz,
+        xcore,
     ]
 
     for arch in archs:
@@ -108,6 +110,7 @@ def subdisassem_script():
             row.arch = disasembler.arch
             row.checksum = checksum
             row.count = len(disasembler)
+            row.rates = str(disasembler.rates[:5])
             row.size = len(raw_bytes) - offset
             row.offset = offset
             row.opcodes = disasembler.objdump