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feat: show exception handler function name if available #3

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feat: show exception handler function name if available #3

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6a6c14f
feat: show exception handler function name if available (disabled by …
crimsonskylark Oct 22, 2024
c53ed8c
fix: properly clean up label when no exception handler is available
crimsonskylark Oct 22, 2024
a0e4f7e
ensure consistent behaviour with the default by using the same label …
crimsonskylark Oct 22, 2024
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34 changes: 29 additions & 5 deletions __init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,6 @@
from PySide6.QtWidgets import QHBoxLayout, QVBoxLayout, QLabel, QWidget, QListWidget, QListWidgetItem, QTextEdit, QCheckBox, QPushButton
from PySide6.QtGui import QMouseEvent


class SEHListItem(QListWidgetItem):
def __init__(self, base: int, entry: ExceptionsDirEntryData):
self.entry = entry
Expand Down Expand Up @@ -86,6 +85,11 @@ def __init__(self, bv: BinaryView, file: PE):

header_layout = QHBoxLayout()

self.show_handler_name = QCheckBox()
handler_name_layout = QHBoxLayout()
handler_name_layout.addWidget(QLabel("Show handler name: "))
handler_name_layout.addWidget(self.show_handler_name)

self.follow_cb = QCheckBox()
follow_layout = QHBoxLayout()
follow_layout.addWidget(QLabel("Follow Cursor: "))
Expand All @@ -97,6 +101,7 @@ def __init__(self, bv: BinaryView, file: PE):

header_layout.addWidget(goto_button)
header_layout.addStretch()
header_layout.addLayout(handler_name_layout)
header_layout.addLayout(follow_layout)

self.begin_addr = AddrLabel(None, bv)
Expand Down Expand Up @@ -124,6 +129,7 @@ def __init__(self, bv: BinaryView, file: PE):
self.unwind_codes = QTextEdit()
self.unwind_codes.setReadOnly(True)
self.unwind_exception_handler = AddrLabel(None, bv)
self.unwind_handler_name = AddrLabel(None, bv)

title = QLabel("Unwind Info")
title.setAlignment(QtCore.Qt.AlignCenter)
Expand All @@ -141,9 +147,12 @@ def __init__(self, bv: BinaryView, file: PE):

unwind_exception_handler_layout = QHBoxLayout()
unwind_exception_handler_layout.addWidget(
QLabel("Exception Handler: "))
QLabel("Exception Handler: "))
unwind_exception_handler_layout.addWidget(
self.unwind_handler_name)
unwind_exception_handler_layout.addWidget(
self.unwind_exception_handler)

unwind_layout.addLayout(unwind_exception_handler_layout)

unwind_prolog_size_layout = QHBoxLayout()
Expand Down Expand Up @@ -204,6 +213,7 @@ def listItemClicked(self, clickedItem):
self.begin_addr.setAddr(None)
self.end_addr.setAddr(None)
self.unwind_addr.setAddr(None)
self.unwind_handler_name.setAddr(None)
self.unwind_version.clear()
self.unwind_flags.clear()
self.unwind_prolog_size.clear()
Expand All @@ -222,7 +232,6 @@ def listItemClicked(self, clickedItem):

self.unwind_version.setText(str(clickedItem.entry.unwindinfo.Version))


unwind_flags = []
if clickedItem.entry.unwindinfo.Flags == 0:
unwind_flags.append("UNW_FLAG_NHANDLER")
Expand Down Expand Up @@ -254,10 +263,25 @@ def listItemClicked(self, clickedItem):
codes += str(x) + '\n'
self.unwind_codes.setText(codes)

self.unwind_handler_name.setHidden(not self.show_handler_name.isChecked())
self.unwind_exception_handler.setHidden(self.unwind_handler_name.isVisible())

self.adjustSize()

if hasattr(clickedItem.entry.unwindinfo, 'ExceptionHandler'):
self.unwind_exception_handler.setAddr(
self.file.OPTIONAL_HEADER.ImageBase + clickedItem.entry.unwindinfo.ExceptionHandler)
handler_addr = self.file.OPTIONAL_HEADER.ImageBase + clickedItem.entry.unwindinfo.ExceptionHandler
symbol = self.bv.get_symbol_at(handler_addr)

if self.unwind_handler_name.isHidden() or symbol.name.startswith("sub_"):
self.unwind_exception_handler.setAddr(
handler_addr)
else:
if all([symbol, symbol.name]):
self.unwind_handler_name.setOptText(
f"{symbol.name} @ ")
self.unwind_handler_name.setAddr(handler_addr)
else:
self.unwind_handler_name.clear()
self.unwind_exception_handler.clear()

@staticmethod
Expand Down