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use std::convert::{AsMut, AsRef};
use std::io;
use std::ops;
use std::os::unix::io::AsRawFd;
mod fmt;
pub mod kvm;
pub mod kvm_sys;
pub mod vcpu;
pub mod vm;
pub mod x86_64;
pub struct PhysAddr(pub u64);
fn libcret(ret: libc::c_int) -> io::Result<libc::c_int> {
if ret < 0 {
Err(io::Error::last_os_error())
} else {
Ok(ret)
}
}
fn ioctl<F: AsRawFd>(fd: &F, cmd: u64, arg: u64) -> io::Result<libc::c_int> {
libcret(unsafe { libc::ioctl(fd.as_raw_fd(), cmd, arg) })
}
pub struct UserMem {
ptr: *mut u8,
len: usize,
}
impl UserMem {
pub fn new(len: usize) -> io::Result<UserMem> {
let ptr = unsafe {
libc::mmap(
std::ptr::null_mut(),
len,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_PRIVATE | libc::MAP_ANONYMOUS,
-1,
0,
)
};
if ptr == libc::MAP_FAILED {
Err(io::Error::last_os_error())
} else {
Ok(UserMem {
ptr: ptr.cast(),
len,
})
}
}
pub fn with_init(len: usize, init_from: &[u8]) -> io::Result<UserMem> {
assert!(len >= init_from.len());
let mut m = UserMem::new(len)?;
m.load(PhysAddr(0), init_from);
Ok(m)
}
pub fn load(&mut self, addr: PhysAddr, data: &[u8]) {
assert!(self.len >= addr.0 as usize + data.len());
let addr = addr.0 as usize;
self.as_mut()[addr..addr + data.len()].copy_from_slice(data);
}
}
impl ops::Drop for UserMem {
fn drop(&mut self) {
unsafe { libc::munmap(self.ptr.cast(), self.len) };
}
}
impl AsRef<[u8]> for UserMem {
fn as_ref(&self) -> &[u8] {
unsafe { std::slice::from_raw_parts(self.ptr, self.len) }
}
}
impl AsMut<[u8]> for UserMem {
fn as_mut(&mut self) -> &mut [u8] {
unsafe { std::slice::from_raw_parts_mut(self.ptr, self.len) }
}
}
struct KvmRun {
ptr: *mut kvm_sys::kvm_run,
len: usize,
}
impl KvmRun {
fn new<F: AsRawFd>(vcpu: &F, len: usize) -> io::Result<KvmRun> {
let ptr = unsafe {
libc::mmap(
std::ptr::null_mut(),
len,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_SHARED,
vcpu.as_raw_fd(),
0,
)
};
if ptr == libc::MAP_FAILED {
Err(io::Error::last_os_error())
} else {
Ok(KvmRun {
ptr: ptr.cast(),
len,
})
}
}
}
impl ops::Drop for KvmRun {
fn drop(&mut self) {
unsafe { libc::munmap(self.ptr.cast(), self.len) };
}
}
impl AsRef<kvm_sys::kvm_run> for KvmRun {
fn as_ref(&self) -> &kvm_sys::kvm_run {
unsafe { & *(self.ptr as *const kvm_sys::kvm_run) }
}
}
impl AsMut<kvm_sys::kvm_run> for KvmRun {
fn as_mut(&mut self) -> &mut kvm_sys::kvm_run {
unsafe { &mut *(self.ptr as *mut kvm_sys::kvm_run) }
}
}