You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
605 B
30 lines
605 B
4 years ago
|
use std::ffi::c_void;
|
||
|
|
use std::ptr;
|
||
|
|
|
||
|
|
#[cfg(nightly)]
|
||
|
|
#[inline(never)]
|
||
|
|
pub fn explicit_prune(buffer: &mut[u8]) {
|
||
|
|
|
||
|
|
unsafe {
|
||
|
|
ptr::write_bytes(buffer.as_mut_ptr() as *mut c_void, 0, buffer.len());
|
||
|
|
if cfg!(target_arch = "x86_64") || cfg !(target_arch = "x86") {
|
||
|
|
asm!("clflush [{}]", in(reg)buffer.as_mut_ptr());
|
||
|
|
} else {
|
||
|
|
asm!("")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[cfg(not(nightly))]
|
||
|
|
#[inline]
|
||
|
|
pub fn explicit_prune(buffer: &mut[u8]) {
|
||
|
|
|
||
|
|
extern "C" {
|
||
|
|
fn explicit_bzero(_: *mut c_void, _:usize);
|
||
|
|
}
|
||
|
|
|
||
|
|
unsafe {
|
||
|
|
explicit_bzero(buffer.as_mut_ptr() as *mut c_void, buffer.len());
|
||
|
|
}
|
||
|
|
}
|