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inspect-binexport2: render aarch64 vector element sizes

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closes #2528
This commit is contained in:
Willi Ballenthin
2024-12-09 09:37:58 +00:00
committed by Willi Ballenthin
parent 6c61a91778
commit aa8e4603d1
1 changed files with 15 additions and 2 deletions
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15
scripts/inspect-binexport2.py
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@@ -81,8 +81,21 @@ def _render_expression_tree(
if expression.type == BinExport2.Expression.REGISTER:
o.write(expression.symbol)
assert len(children_tree_indexes) == 0
assert len(children_tree_indexes) <= 1
if len(children_tree_indexes) == 0:
return
elif len(children_tree_indexes) == 1:
# like for aarch64 with vector instructions, indicating vector data size:
#
# FADD V0.4S, V1.4S, V2.4S
#
# see: https://github.com/mandiant/capa/issues/2528
child_index = children_tree_indexes[0]
_render_expression_tree(be2, operand, expression_tree, child_index, o)
return
else:
raise NotImplementedError(len(children_tree_indexes))
elif expression.type == BinExport2.Expression.SYMBOL:
o.write(expression.symbol)