init: mount/unmount test

.nlsp-settings/rust_analyzer.json

@@ -0,0 +1,7 @@
+{
+    "rust-analyzer.cargo.target": "aarch64-unknown-yggdrasil",
+    "rust-analyzer.server.extraEnv": {
+        "RUSTUP_TOOLCHAIN": "ygg-stage1",
+        "RA_LOG": "debug"
+    }
+}

Cargo.toml

@@ -1,4 +1,5 @@
 [workspace]
+resolver = "1"
 members = [
     "init"
 ]

build.sh

@@ -13,8 +13,6 @@ fi
 USER_TARGET=${ARCH}-unknown-yggdrasil
 USER_CARGO_OPTS="--target=${USER_TARGET}"
 
-USER_FILES=init
-
 pstatus() {
     echo -e "[BUILD] \033[32;1m$@\033[0m"
 }
@@ -32,8 +30,16 @@ check_toolchain() {
 }
 
 pack_initrd() {
-    cd "target/${USER_TARGET}/${PROFILE}"
-    tar --xform='s/^/\//' -cf initrd.tar ${USER_FILES}
+    local build_dir=target/${USER_TARGET}/${PROFILE}
+    local root_dir=${build_dir}/rootfs
+    mkdir -p "${root_dir}"
+
+    cp ${build_dir}/init ${root_dir}
+
+    cd "${root_dir}"
+    mkdir -p dev
+
+    tar cf ../initrd.tar `find . -printf "%P\n"`
     cd -
 }
 

init/src/main.rs

@@ -1,3 +1,39 @@
+#![feature(rustc_private)]
+
+use std::fs::File;
+use std::io::Read;
+use std::os::yggdrasil::{mount, unmount, MountOptions, UnmountOptions};
+
 fn main() {
     println!("Hello!");
+
+    unsafe {
+        mount(MountOptions {
+            source: None,
+            filesystem: Some("devfs"),
+            target: "/dev",
+        })
+        .unwrap();
+    }
+
+    let mut file = File::open("/dev/ttyS0").unwrap();
+    let mut buf = [0; 1];
+
+    while let Ok(count) = file.read(&mut buf) {
+        if count != 1 {
+            break;
+        }
+
+        if buf[0] == 0x3 {
+            break;
+        }
+
+        println!("Got {:#x}", buf[0]);
+    }
+
+    unsafe {
+        unmount(UnmountOptions {
+            mountpoint: "/dev"
+        }).unwrap();
+    }
 }

rust-toolchain.toml

@@ -0,0 +1,3 @@
+[toolchain]
+channel = "ygg-stage1"
+targets = ["aarch64-unknown-yggdrasil"]