Cleanup Redox repo, update Rust, remove old target

kernel/arch/arm/src/panic.rs

@@ -0,0 +1,38 @@
+//! Intrinsics for panic handling
+
+use interrupt;
+
+#[cfg(not(test))]
+#[lang = "eh_personality"]
+extern "C" fn eh_personality() {}
+
+#[cfg(not(test))]
+/// Required to handle panics
+#[lang = "panic_fmt"]
+extern "C" fn panic_fmt(fmt: ::core::fmt::Arguments, file: &str, line: u32) -> ! {
+    println!("PANIC: {}", fmt);
+    println!("FILE: {}", file);
+    println!("LINE: {}", line);
+
+    unsafe { interrupt::stack_trace(); }
+
+    println!("HALT");
+    loop {
+        unsafe { interrupt::halt(); }
+    }
+}
+
+#[allow(non_snake_case)]
+#[no_mangle]
+/// Required to handle panics
+pub extern "C" fn _Unwind_Resume() -> ! {
+    loop {
+        unsafe { interrupt::halt(); }
+    }
+}
+
+/// Required for linker
+#[no_mangle]
+pub extern "C" fn __aeabi_unwind_cpp_pr0() {
+    loop {}
+}