75 lines
2.6 KiB
Rust
75 lines
2.6 KiB
Rust
/****************************************************************************
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* apps/examples/hello_rust/hello_rust_main.rs
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Attributes
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****************************************************************************/
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#![no_main]
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#![no_std]
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/****************************************************************************
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* Uses
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****************************************************************************/
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use core::panic::PanicInfo;
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/****************************************************************************
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* Externs
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****************************************************************************/
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extern "C" {
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pub fn printf(format: *const u8, ...) -> i32;
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}
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/****************************************************************************
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* Private functions
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****************************************************************************/
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/****************************************************************************
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* Panic handler (needed for [no_std] compilation)
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****************************************************************************/
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#[panic_handler]
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fn panic(_panic: &PanicInfo<'_>) -> ! {
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loop {}
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}
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/****************************************************************************
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* Public functions
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****************************************************************************/
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/****************************************************************************
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* hello_rust_main
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****************************************************************************/
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#[no_mangle]
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pub extern "C" fn hello_rust_main(_argc: i32, _argv: *const *const u8) -> i32 {
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/* "Hello, Rust!!" using printf() from libc */
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unsafe {
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printf(b"Hello, Rust!!\n\0" as *const u8);
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}
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/* exit with status 0 */
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0
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}
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