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use ovmf_prebuilt::{Arch, FileType, Prebuilt, Source};
use std::{
env,
process::{Command, exit},
};
fn main() {
// read env variables that were set in build script
let uefi_path = env!("UEFI_PATH");
let bios_path = env!("BIOS_PATH");
// parse mode from CLI
let args: Vec<String> = env::args().collect();
let prog = &args[0];
// choose whether to start the UEFI or BIOS image
let uefi = match args.get(1).map(|s| s.to_lowercase()) {
Some(ref s) if s == "uefi" => true,
Some(ref s) if s == "bios" => false,
Some(ref s) if s == "-h" || s == "--help" => {
println!("Usage: {prog} [uefi|bios]");
println!(" uefi - boot using OVMF (UEFI)");
println!(" bios - boot using legacy BIOS");
exit(0);
}
_ => true,
};
let mut cmd = Command::new("qemu-system-x86_64");
// print serial output to the shell
cmd.arg("-serial").arg("mon:stdio");
// don't display video output
cmd.arg("-display").arg("none");
// enable the guest to exit qemu
cmd.arg("-device").arg("isa-debug-exit,iobase=0xf4,iosize=0x04");
if uefi {
let prebuilt =
Prebuilt::fetch(Source::LATEST, "target/ovmf").expect("failed to update prebuilt");
let code = prebuilt.get_file(Arch::X64, FileType::Code);
let vars = prebuilt.get_file(Arch::X64, FileType::Vars);
cmd.arg("-drive").arg(format!("format=raw,file={uefi_path}"));
cmd.arg("-drive")
.arg(format!("if=pflash,format=raw,unit=0,file={},readonly=on", code.display()));
// copy vars and enable rw instead of snapshot if you want to store data
// (e.g. enroll secure boot keys)
cmd.arg("-drive")
.arg(format!("if=pflash,format=raw,unit=1,file={},snapshot=on", vars.display()));
} else {
cmd.arg("-drive").arg(format!("format=raw,file={bios_path}"));
}
let mut child = cmd.spawn().expect("failed to start qemu-system-x86_64");
let status = child.wait().expect("failed to wait on qemu");
match status.code().unwrap_or(1) {
0x10 => 0, // success
0x11 => 1, // failure
_ => 2, // unknown fault
};
}
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