Move all logging into Rust

native/rust/init/src/lib.rs

@@ -1 +1,11 @@
 pub use base;
+pub use logging::*;
+
+mod logging;
+
+#[cxx::bridge(namespace = "rust")]
+pub mod ffi2 {
+    extern "Rust" {
+        fn setup_klog();
+    }
+}

native/rust/init/src/logging.rs

@@ -0,0 +1,31 @@
+use std::fmt::Arguments;
+use base::*;
+
+extern "C" {
+    fn klog_write(msg: *const u8, len: i32);
+}
+
+pub fn setup_klog() {
+    fn klog_impl(args: Arguments) {
+        const PREFIX: &[u8; 12] = b"magiskinit: ";
+        const PFX_LEN: usize = PREFIX.len();
+
+        let mut buf: [u8; 4096] = [0; 4096];
+        buf[..PFX_LEN].copy_from_slice(PREFIX);
+        let len = fmt_to_buf(&mut buf[PFX_LEN..], args) + PFX_LEN;
+        unsafe {
+            klog_write(buf.as_ptr(), len as i32);
+        }
+    }
+
+    let logger = Logger {
+        d: klog_impl,
+        i: klog_impl,
+        w: klog_impl,
+        e: klog_impl,
+    };
+    exit_on_error(false);
+    unsafe {
+        LOGGER = logger;
+    }
+}