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Ghidra Import: Support virtual inheritance (#1071)

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* Implement/fix Ghidra imports for multiple and virtual inheritance

Unfortunately, the handling in Ghidra is still far from perfect. This is a good place to start, though.

* Support offsets in vbase pointers

* Support `this adjust`

* minor stylistic improvement

* Improvements to documentation

---------

Co-authored-by: jonschz <jonschz@users.noreply.github.com>
This commit is contained in:
jonschz
2024-07-30 19:02:15 +02:00
committed by GitHub
parent 1f251ff817
commit 412200ecbc
6 changed files with 549 additions and 72 deletions
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18
tools/ghidra_scripts/lego_util/ghidra_helper.py
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@@ -11,10 +11,8 @@ from lego_util.exceptions import (
# Disable spurious warnings in vscode / pylance
# pyright: reportMissingModuleSource=false
from ghidra.program.model.data import PointerDataType
from ghidra.program.model.data import DataTypeConflictHandler
from ghidra.program.flatapi import FlatProgramAPI
from ghidra.program.model.data import DataType
from ghidra.program.model.data import DataType, DataTypeConflictHandler, PointerDataType
from ghidra.program.model.symbol import Namespace
logger = logging.getLogger(__name__)
@@ -37,9 +35,15 @@ def get_ghidra_type(api: FlatProgramAPI, type_name: str):
raise MultipleTypesFoundInGhidraError(type_name, result)
def add_pointer_type(api: FlatProgramAPI, pointee: DataType) -> DataType:
new_data_type = PointerDataType(pointee)
new_data_type.setCategoryPath(pointee.getCategoryPath())
def get_or_add_pointer_type(api: FlatProgramAPI, pointee: DataType) -> DataType:
new_pointer_data_type = PointerDataType(pointee)
new_pointer_data_type.setCategoryPath(pointee.getCategoryPath())
return add_data_type_or_reuse_existing(api, new_pointer_data_type)
def add_data_type_or_reuse_existing(
api: FlatProgramAPI, new_data_type: DataType
) -> DataType:
result_data_type = (
api.getCurrentProgram()
.getDataTypeManager()
@@ -47,7 +51,7 @@ def add_pointer_type(api: FlatProgramAPI, pointee: DataType) -> DataType:
)
if result_data_type is not new_data_type:
logger.debug(
"New pointer replaced by existing one. Fresh pointer: %s (class: %s)",
"Reusing existing data type instead of new one: %s (class: %s)",
result_data_type,
result_data_type.__class__,
)