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make malloc probe a bit nicer

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bgkillas 2025-11-27 10:05:18 -05:00
parent 3467385210
commit f1e4166173
1 changed files with 26 additions and 6 deletions
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32
extra/malloc_probe/src/lib.rs
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@ -21,18 +21,38 @@ unsafe extern "cdecl" fn operator_delete(pointer: *mut c_void) {
#[unsafe(no_mangle)]
unsafe extern "C" fn dummy() {}
unsafe fn make_writable(addr: usize) {
unsafe fn make_writable(addr: *mut *const usize) {
let mut old = PAGE_PROTECTION_FLAGS(0);
unsafe {
VirtualProtect(addr as *const _, 8, PAGE_READWRITE, &mut old).unwrap();
VirtualProtect(addr.cast(), 8, PAGE_READWRITE, &mut old).unwrap();
}
}
fn write(addr: *mut *const usize, new: *const usize) {
unsafe {
make_writable(addr);
addr.write(new)
}
}
#[unsafe(no_mangle)]
pub extern "stdcall" fn DllMain(_: *const u8, _: u32, _: *const u8) -> u32 {
unsafe { make_writable(0x00f07500) };
unsafe { (0x00f07500 as *mut *const usize).write(operator_new as *const usize) };
unsafe { make_writable(0x00f07504) };
unsafe { (0x00f07504 as *mut *const usize).write(operator_delete as *const usize) };
/*write(
0x00f074f0 as *mut *const usize, //malloc
operator_new as *const usize,
);*/
write(
0x00f07500 as *mut *const usize, //operator_new
operator_new as *const usize,
);
/*write(
0x00f074f4 as *mut *const usize, //free
operator_delete as *const usize,
);*/
write(
0x00f07504 as *mut *const usize, //operator_delete
operator_delete as *const usize,
);
1
}