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Handle cases where constant is accessed by address

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This commit is contained in:
Boris Batteux
2021-02-25 16:19:38 +01:00
parent b45c7ea84b
commit d3443e9102
1 changed files with 11 additions and 4 deletions
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15
d810/optimizers/instructions/early/mem_read.py
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@@ -63,11 +63,18 @@ class SetGlobalVariablesToZeroIfDetectedReadOnly(EarlyRule):
return True
def check_candidate(self, candidate):
if candidate["ro_dword"].mop.t != mop_v:
return False
mem_read_address = candidate["ro_dword"].mop.g
if not self.is_read_only_inited_var(mem_read_address):
mem_read_address = None
if candidate["ro_dword"].mop.t == mop_v:
mem_read_address = candidate["ro_dword"].mop.g
elif candidate["ro_dword"].mop.t == mop_a:
if candidate["ro_dword"].mop.a.t == mop_v:
mem_read_address = candidate["ro_dword"].mop.a.g
if mem_read_address is None:
return False
if not self.is_read_only_inited_var(mem_read_address):
return False
candidate.add_constant_leaf("val_res", 0, candidate["ro_dword"].mop.size)
return True