xref: /DragonOS/build-scripts/kernel_build/src/bindgen/mod.rs (revision fae6e9ade46a52976ad5d099643d51cc20876448)
1 use std::{path::PathBuf, str::FromStr};
2 
3 use crate::{bindgen::arch::current_bindgenarch, utils::cargo_handler::CargoHandler};
4 
5 mod arch;
6 
7 /// 生成 C->Rust bindings
8 pub fn generate_bindings() {
9     let wrapper_h = PathBuf::from_str("src/include/bindings/wrapper.h")
10         .expect("Failed to parse 'wrapper.h' path");
11     CargoHandler::emit_rerun_if_files_changed(&[wrapper_h.clone()]);
12 
13     let out_path = PathBuf::from(String::from("src/include/bindings/"));
14 
15     // The bindgen::Builder is the main entry point
16     // to bindgen, and lets you build up options for
17     // the resulting bindings.
18 
19     let builder = bindgen::Builder::default()
20         .clang_arg("-I./src")
21         .clang_arg("-I./src/include")
22         // The input header we would like to generate
23         // bindings for.
24         .header(wrapper_h.to_str().unwrap())
25         .blocklist_file("src/include/bindings/bindings.h")
26         .clang_arg("-v")
27         // 使用core,并将c语言的类型改为core::ffi,而不是使用std库。
28         .use_core()
29         .ctypes_prefix("::core::ffi")
30         .generate_inline_functions(true)
31         .raw_line("#![allow(dead_code)]")
32         .raw_line("#![allow(non_upper_case_globals)]")
33         .raw_line("#![allow(non_camel_case_types)]")
34         // Tell cargo to invalidate the built crate whenever any of the
35         // included header files changed.
36         .parse_callbacks(Box::new(bindgen::CargoCallbacks));
37 
38     // 处理架构相关的绑定
39     let builder = current_bindgenarch().generate_bindings(builder);
40 
41     // Finish the builder and generate the bindings.
42     let bindings = builder
43         .generate()
44         // Unwrap the Result and panic on failure.
45         .expect("Unable to generate bindings");
46 
47     bindings
48         .write_to_file(out_path.join("bindings.rs"))
49         .expect("Couldn't write bindings!");
50 }
51