more things

rawc/build.rs

@@ -0,0 +1,4 @@
+fn main() {
+    println!("cargo:rustc-link-arg=-nostartfiles");
+    println!("cargo:rustc-link-arg=-nostdlib");
+}

rawc/src/lib.rs

@@ -1,11 +1,15 @@
 #![no_std]
 #![feature(panic_info_message)]
+#![deny(clippy::no_mangle_with_rust_abi)]
 
+mod rt;
 mod stdio;
+mod stdlib;
 mod string;
 
 // libcore seems to require this symbol, even though it's unused.
 #[no_mangle]
+#[allow(clippy::no_mangle_with_rust_abi)]
 fn rust_eh_personality() {
     unsafe {
         libuwuc::trap!();

rawc/src/rt.rs

@@ -0,0 +1,7 @@
+#[no_mangle]
+pub extern "C" fn __stack_chk_fail() -> ! {
+    unsafe {
+        let _ = libuwuc::io::write_all(libuwuc::io::STDERR, b"error: stack overflow");
+        libuwuc::start::abort();
+    }
+}

rawc/src/stdlib.rs

@@ -0,0 +1,14 @@
+#[no_mangle]
+pub unsafe extern "C" fn malloc(size: usize) -> *mut u8 {
+    libuwuc::alloc::malloc_zeroed(size, 16)
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn free(ptr: *mut u8) {
+    libuwuc::alloc::free(ptr)
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn exit(code: i32) -> ! {
+    libuwuc::start::exit(code as i64 as _)
+}

rawc/src/string.rs

@@ -9,13 +9,13 @@ pub unsafe extern "C" fn memcpy(dest: *mut u8, src: *const u8, size: usize) -> *
 }
 
 #[no_mangle]
-pub unsafe fn memcmp(s1: *const u8, s2: *const u8, size: usize) -> i32 {
+pub unsafe extern "C" fn memcmp(s1: *const u8, s2: *const u8, size: usize) -> i32 {
     libuwuc::mem::memcmp(s1, s2, size)
 }
 
 
 #[no_mangle]
-pub unsafe fn bcmp(s1: *const u8, s2: *const u8, size: usize) -> i32 {
+pub unsafe extern "C" fn bcmp(s1: *const u8, s2: *const u8, size: usize) -> i32 {
     libuwuc::mem::memcmp(s1, s2, size)
 }