init

.cargo/config.toml

@@ -0,0 +1,2 @@
+[target.x86_64-unknown-linux-gnu]
+rustflags = ["-Clink-arg=-nostartfiles", "-Clink-arg=-nostdlib"]

.gitignore

@@ -0,0 +1,3 @@
+/target
+/example-user/target
+/.vscode

Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "libuwuc"
+version = "0.1.0"
+dependencies = [
+ "cfg-if",
+]

Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "libuwuc"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[profile.dev]
+panic = "abort"
+
+[profile.release]
+panic = "abort"
+
+[dependencies]
+cfg-if = "1.0.0"
+
+[features]
+export_symbols = []

example-user/Cargo.lock

@@ -0,0 +1,23 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "example-user"
+version = "0.1.0"
+dependencies = [
+ "libuwuc",
+]
+
+[[package]]
+name = "libuwuc"
+version = "0.1.0"
+dependencies = [
+ "cfg-if",
+]

example-user/Cargo.toml

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+[workspace]
+
+[package]
+name = "example-user"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[profile.dev]
+panic = "abort"
+
+[profile.release]
+panic = "abort"
+
+[dependencies]
+libuwuc = { path = "..", features = ["export_symbols"] }

example-user/src/main.rs

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+#![cfg_attr(not(test), no_std)]
+#![no_main]
+
+use core::ffi::c_char;
+
+extern crate libuwuc;
+
+#[panic_handler]
+#[cfg(not(test))]
+fn handler(_arg: &core::panic::PanicInfo) -> ! {
+    loop {}
+}
+
+#[no_mangle]
+extern "C" fn main(_argc: i32, _argv: *const *const c_char) -> i32 {
+    0
+}

flake.lock

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+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1695830400,
+        "narHash": "sha256-gToZXQVr0G/1WriO83olnqrLSHF2Jb8BPcmCt497ro0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8a86b98f0ba1c405358f1b71ff8b5e1d317f5db2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = import nixpkgs { inherit system; };
+    in
+    {
+      devShells.default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          rustup
+        ];
+        shellHook = ''
+          export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
+          export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/$RUSTC_VERSION-x86_64-unknown-linux-gnu/bin/
+        '';
+        packages = (with pkgs; [
+        ]);
+      };
+    });
+}

src/lib.rs

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+#![no_std]
+#![warn(unreachable_pub)]
+
+mod sys;

src/sys/mod.rs

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+cfg_if::cfg_if! {
+    if #[cfg(target_arch = "x86_64")] {
+        mod x86_64;
+        pub(crate) use x86_64::*;
+    } else {
+        compile_error!("uwuc does not support this target yet!");
+    }
+}

src/sys/x86_64/mod.rs

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+pub(crate) mod start;

test.sh

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+#!/usr/bin/env bash
+
+cargo run --manifest-path example-user/Cargo.toml