split linux modules utilities

2026-09-06 01:37:39 +02:00 · 2025-01-23 10:42:52 +01:00
parent d2314ed1ef
commit 34a7dfc72f
1 changed files with 68 additions and 0 deletions
@@ -0,0 +1,68 @@
+from typing import Iterator, List, Tuple
+
+from volatility3 import framework
+from volatility3.framework import constants, interfaces
+from volatility3.framework.objects import utility
+
+
+class Modules(interfaces.configuration.VersionableInterface):
+    """Kernel modules related utilities."""
+
+    _version = (1, 0, 0)
+    _required_framework_version = (2, 0, 0)
+
+    framework.require_interface_version(*_required_framework_version)
+
+    @staticmethod
+    def mask_mods_list(
+        context: interfaces.context.ContextInterface,
+        layer_name: str,
+        mods: Iterator[interfaces.objects.ObjectInterface],
+    ) -> List[Tuple[str, int, int]]:
+        """
+        A helper function to mask the starting and end address of kernel modules
+        """
+        mask = context.layers[layer_name].address_mask
+
+        return [
+            (
+                utility.array_to_string(mod.name),
+                mod.get_module_base() & mask,
+                (mod.get_module_base() & mask) + mod.get_core_size(),
+            )
+            for mod in mods
+        ]
+
+    @staticmethod
+    def lookup_module_address(
+        context: interfaces.context.ContextInterface,
+        kernel_module_name: str,
+        handlers: List[Tuple[str, int, int]],
+        target_address: int,
+    ) -> Tuple[str, str]:
+        """
+        Searches between the start and end address of the kernel module using target_address.
+        Returns the module and symbol name of the address provided.
+        """
+        kernel_module = context.modules[kernel_module_name]
+        mod_name = "UNKNOWN"
+        symbol_name = "N/A"
+
+        for name, start, end in handlers:
+            if start <= target_address <= end:
+                mod_name = name
+                if name == constants.linux.KERNEL_NAME:
+                    symbols = list(
+                        kernel_module.get_symbols_by_absolute_location(target_address)
+                    )
+
+                    if len(symbols):
+                        symbol_name = (
+                            symbols[0].split(constants.BANG)[1]
+                            if constants.BANG in symbols[0]
+                            else symbols[0]
+                        )
+
+                break
+
+        return mod_name, symbol_name