Merge branch 'enhancement-contrib-import' into dev

.gdbinit

@@ -6,10 +6,13 @@ target remote tcp::1234
 file bin/kernel.elf
 symbol-file bin/kernel.elf
 handle SIGSEGV nostop noprint nopass
+set scheduler-locking step
 set confirm off
 focus cmd
 set detach-on-fork
 b _do_start
+b _do_ap_start
+b _ap_trampoline
 b kmain
 
 define hook-stop

Cargo.toml

@@ -3,13 +3,17 @@
 
 [package]
 name = "kernel"
-version = "0.4.4"
+version = "0.5.0"
 license-file = "LICENSE.txt"
 edition = "2021"
 authors = ["The Maintainers of Nanvix"]
 description = "Nanvix Kernel"
 homepage = "https://github.com/nanvix"
 
+[lib]
+name = "sys"
+path = "src/lib.rs"
+
 [[bin]]
 name = "kernel"
 path = "src/kmain.rs"
@@ -25,7 +29,6 @@ arch = { git = "https://github.com/nanvix/arch", branch = "releases/v1.3.1", fea
     "xapic",
 ] }
 cfg-if = "1.0.0"
-sys = { git = "https://github.com/nanvix/sys", branch = "releases/v2.0.0" }
 
 [build-dependencies]
 cc = "1.1.18"

build.rs

@@ -29,36 +29,20 @@ fn main() {
         Err(_) => panic!("failed to get OUT_DIR environment variable"),
     };
 
-    // Get PATH environment variable.
-    let path: String = match env::var("PATH") {
-        Ok(path) => path,
-        Err(_) => panic!("failed to get PATH environment variable"),
-    };
-
-    // Get TOOLCHAIN_DIR environment variable.
-    let toolchain_dir: String = match env::var("TOOLCHAIN_DIR") {
-        Ok(toolchain_dir) => toolchain_dir,
-        Err(_) => panic!("failed to get TOOLCHAIN_DIR environment variable"),
-    };
-
-    // Add cross-compiler toolchain to PATH as `targets/*.json` relies on this.
-    let gcc_home: String = format!("{}/i486/bin", toolchain_dir);
-    let path: String = format!("{}:{}", gcc_home, path);
-    println!("cargo::rustc-env=PATH={}", path);
-    println!("cargo::rerun-if-env-changed=TOOLCHAIN_DIR");
-
     //==============================================================================================
     // Configure Toolchain
     //==============================================================================================
 
-    let cc: String = format!("{}/i486-elf-gcc", gcc_home);
+    let cc: String = format!("gcc");
 
     let mut cflags: Vec<&str> = vec![
         "-nostdlib",
         "-ffreestanding",
         "-march=pentiumpro",
+        "-Wa,-march=pentiumpro",
         "-Wstack-usage=4096",
         "-Wall",
+        "-m32",
         "-Wextra",
         "-Werror",
     ];
@@ -132,7 +116,7 @@ fn main() {
     //==============================================================================================
 
     let status: ExitStatus = Command::new("ar")
-        .args(&["crus", "libkernel.a"])
+        .args(&["rcs", "libkernel.a"])
         .args(&object_files)
         .current_dir(&Path::new(&out_dir))
         .status()

src/lib.rs

@@ -0,0 +1,27 @@
+// Copyright(c) The Maintainers of Nanvix.
+// Licensed under the MIT License.
+
+//==================================================================================================
+// Configuration
+//==================================================================================================
+
+#![deny(clippy::all)]
+#![forbid(clippy::large_stack_frames)]
+#![forbid(clippy::large_stack_arrays)]
+#![feature(ptr_sub_ptr)] // Slab::deallocate() uses this.
+#![no_std]
+
+//==================================================================================================
+// Imports
+//==================================================================================================
+
+extern crate alloc;
+
+//==================================================================================================
+// Modules
+//==================================================================================================
+
+/// System configuration constants.
+mod sys;
+
+pub use sys::*;