these-android-re/androscalpel
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bug fix bug fix bug fix WIP

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This commit is contained in:
Jean-Marie Mineau 2024-01-03 18:00:36 +01:00
parent b30e91b86a
commit b17a84212f
Signed by: histausse
GPG key ID: B66AEEDA9B645AD2
5 changed files with 153 additions and 151 deletions
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35
androscalpel_serializer/src/items/code.rs
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@ -35,12 +35,16 @@ impl CodeItem {
pub fn sanity_check(&self) -> Result<()> {
if self.tries.is_empty() && self.handlers.is_some() {
return Err(Error::InconsistantStruct(
"CodeItem cannot have a `handlers` value if `tries_size` is 0 (CodeItem.tries is empty)".into()
"CodeItem cannot have a `handlers` value if `tries_size` \
is 0 (CodeItem.tries is empty)"
.into(),
));
}
if !self.tries.is_empty() && self.handlers.is_none() {
return Err(Error::InconsistantStruct(
"CodeItem must have a `handlers` value if `tries_size` is not 0 (CodeItem.tries not empty)".into()
"CodeItem must have a `handlers` value if `tries_size` \
is not 0 (CodeItem.tries not empty)"
.into(),
));
}
let mut max_addr = 0;
@ -48,7 +52,9 @@ impl CodeItem {
let addr = item.start_addr;
if addr < max_addr {
return Err(Error::InconsistantStruct(
"try_item in a code_item must be non overlapping and sorted from low to high address".into()
"try_item in a code_item must be non overlapping and \
sorted from low to high address"
.into(),
));
}
max_addr = addr + (item.insn_count as u32);
@ -121,8 +127,10 @@ impl CodeItem {
}
}
if i < addresses.len() && addresses[i] < addr {
println!("{addresses:x?}");
return Err(Error::InconsistantStruct(format!(
"Found an address in try block (0x{addr:x}) that does not align with an instruction"
"Found an address in try block (0x{:x}) that does not align with an instruction",
addresses[i]
)));
}
@ -170,11 +178,21 @@ impl Serializable for CodeItem {
let mut insns = vec![];
let mut serialized_insns_size = 0;
while serialized_insns_size != insns_size {
let ins = Instruction::deserialize(input)?;
serialized_insns_size += ins.size() as u32;
while serialized_insns_size < insns_size {
let ins = Instruction::deserialize(input).map_err(|err| {
Error::DeserializationError(format!(
"Failed to deserialize instruction at 0x{serialized_insns_size:x}: {err}"
))
})?;
serialized_insns_size += ins.size() as u32 / 2;
insns.push(ins);
}
if serialized_insns_size != insns_size {
return Err(Error::DeserializationError(format!(
"Failed to deserialize instructions, expected size of {insns_size} code \
units (16 bits), found at least {serialized_insns_size}"
)));
}
if tries_size != 0 && insns_size % 2 == 1 {
let _ = u16::deserialize(input)?;
}
@ -265,7 +283,8 @@ impl EncodedCatchHandlerList {
current_offset += handler.size();
}
Err(Error::InconsistantStruct(format!(
"Offset 0x{offset:x} does not match with the begining of a EncodedCatchHandler in this EncodedCatchHandlerList"
"Offset 0x{offset:x} does not match with the begining of a \
EncodedCatchHandler in this EncodedCatchHandlerList"
)))
}
}