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Fix i386 QEMU read_function_argument() (#1677)

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Andrea Fioraldi 2023-11-20 13:53:29 +01:00 committed by GitHub
parent a278357ed9
commit aa69436b64
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 5 deletions
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10
libafl_qemu/src/i386.rs
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@ -80,7 +80,6 @@ impl crate::ArchExtras for crate::CPU {
match idx { match idx {
0..=1 => { 0..=1 => {
let val: GuestReg = val.into();
let stack_ptr: GuestAddr = self.read_reg(Regs::Sp)?; let stack_ptr: GuestAddr = self.read_reg(Regs::Sp)?;
/* /*
* Stack is full and descending. SP points to return address, arguments * Stack is full and descending. SP points to return address, arguments
@ -89,10 +88,11 @@ impl crate::ArchExtras for crate::CPU {
let size: GuestAddr = size_of::<GuestReg>() as GuestAddr; let size: GuestAddr = size_of::<GuestReg>() as GuestAddr;
let offset = size * (idx as GuestAddr + 1); let offset = size * (idx as GuestAddr + 1);
let val = unsafe { let mut val = [0u8; size_of::<GuestReg>()];
self.read_mem(stack_ptr + offset, size_of::<GuestReg>()); unsafe {
}; self.read_mem(stack_ptr + offset, &mut val);
Ok(GuestReg::from_le_bytes(val)) }
Ok(GuestReg::from_le_bytes(val).into())
} }
_ => Err(format!("Unsupported argument: {idx:}")), _ => Err(format!("Unsupported argument: {idx:}")),
} }