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// Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#![cfg(any(target_arch = "x86", target_arch = "x86_64"))]
use kvm::*;
use kvm_sys::kvm_regs;
use sys_util::{GuestAddress, GuestMemory};
#[test]
fn test_run() {
// This example based on https://lwn.net/Articles/658511/
let code = [
0xba, 0xf8, 0x03, /* mov $0x3f8, %dx */
0x00, 0xd8, /* add %bl, %al */
0x04, '0' as u8, /* add $'0', %al */
0xee, /* out %al, (%dx) */
0xb0, '\n' as u8, /* mov $'\n', %al */
0xee, /* out %al, (%dx) */
0x2e, 0xc6, 0x06, 0xf1, 0x10, 0x13, /* movb $0x13, %cs:0xf1 */
0xf4, /* hlt */
];
let mem_size = 0x1000;
let load_addr = GuestAddress(0x1000);
let mem = GuestMemory::new(&vec![(load_addr, mem_size)]).unwrap();
let kvm = Kvm::new().expect("new kvm failed");
let vm = Vm::new(&kvm, mem).expect("new vm failed");
let vcpu = Vcpu::new(0, &kvm, &vm).expect("new vcpu failed");
vm.get_memory()
.write_at_addr(&code, load_addr)
.expect("Writing code to memory failed.");
let mut vcpu_sregs = vcpu.get_sregs().expect("get sregs failed");
assert_ne!(vcpu_sregs.cs.base, 0);
assert_ne!(vcpu_sregs.cs.selector, 0);
vcpu_sregs.cs.base = 0;
vcpu_sregs.cs.selector = 0;
vcpu.set_sregs(&vcpu_sregs).expect("set sregs failed");
let mut vcpu_regs: kvm_regs = unsafe { std::mem::zeroed() };
vcpu_regs.rip = 0x1000;
vcpu_regs.rax = 2;
vcpu_regs.rbx = 7;
vcpu_regs.rflags = 2;
vcpu.set_regs(&vcpu_regs).expect("set regs failed");
let mut out = String::new();
let runnable_vcpu = vcpu.to_runnable(None).unwrap();
loop {
match runnable_vcpu.run().expect("run failed") {
VcpuExit::IoOut {
port: 0x3f8,
size,
data,
} => {
assert_eq!(size, 1);
out.push(data[0] as char);
}
VcpuExit::Hlt => break,
r => panic!("unexpected exit reason: {:?}", r),
}
}
assert_eq!(out, "9\n");
let result: u8 = vm
.get_memory()
.read_obj_from_addr(load_addr.checked_add(0xf1).unwrap())
.expect("Error reading the result.");
assert_eq!(result, 0x13);
}
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