build assembly true/false with cargo

Cargo.toml

@@ -12,12 +12,4 @@ authors = [
 
 [[bin]]
 name = "cat"
-path = "src/bin/cat.rs"
-
-[[bin]]
-name = "false"
-path = "src/bin/false.rs"
-
-[[bin]]
-name = "true"
-path = "src/bin/true.rs"
+path = "src/bin/cat.rs"

build.rs

@@ -1,4 +1,47 @@
-fn main() {
-	println!("cargo:rustc-link-arg-bin=true=-nostartfiles");
-	println!("cargo:rustc-link-arg-bin=false=-nostartfiles");
+use std::env;
+use std::process::{Command, exit};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+	let out_dir = env::var("OUT_DIR")?;
+
+	let mut handler_nasm_true = Command::new("nasm").args([
+		"-f", "elf",
+		"src/asm/true.asm",
+		"-o", &(out_dir.clone() + "/true.o")
+	]).spawn()?;
+
+	let mut handler_nasm_false = Command::new("nasm").args([
+		"-f", "elf",
+		"src/asm/false.asm",
+		"-o", &(out_dir.clone() + "/false.o")
+	]).spawn()?;
+
+
+	if !handler_nasm_true.wait_with_output()?.stderr.is_empty() {
+		exit(1);
+	}
+	let mut handler_ld_true = Command::new("ld").args([
+		"-m", "elf_i386",
+		"src/asm/true.asm",
+		"-s",
+		&(out_dir.clone() + "/true.o"),
+		"-o", &(out_dir.clone() + "/true"),
+	]).spawn()?;
+
+	if !handler_nasm_false.wait_with_output()?.stderr.is_empty() {
+		exit(1)
+	}
+	let mut handler_ld_false = Command::new("ld").args([
+		"-m", "elf_i386",
+		"src/asm/false.asm",
+		"-s",
+		&(out_dir.clone() + "/false.o"),
+		"-o", &(out_dir.clone() + "/false"),
+	]).spawn()?;
+
+
+	handler_ld_true.wait();
+	handler_ld_false.wait();
+
+	Ok(())
 }

src/bin/false.rs

@@ -1,22 +0,0 @@
-// Copyright (c) 2022 silt <silt@tebibyte.media>
-// SPDX-License-Identifier: AGPL-3.0-or-later
-
-#![feature(lang_items, start)]
-#![no_main]
-#![no_std]
-
-use core::panic::PanicInfo;
-use core::arch::asm;
-
-#[lang = "eh_personality"] extern fn rust_eh_personality() {}
-#[lang = "panic_impl"] extern fn rust_begin_panic(_: &PanicInfo) -> ! { loop {} }
-
-#[no_mangle]
-pub unsafe fn _start() -> ! {
-	asm!(
-	"syscall",
-	in("rax") 60,  // Syscall number
-	in("rdi") 1,   // Exit code
-	options(noreturn)
-	)
-}

src/bin/true.rs

@@ -1,22 +0,0 @@
-// Copyright (c) 2022 silt <silt@tebibyte.media>
-// SPDX-License-Identifier: AGPL-3.0-or-later
-
-#![feature(lang_items, start)]
-#![no_main]
-#![no_std]
-
-use core::panic::PanicInfo;
-use core::arch::asm;
-
-#[lang = "eh_personality"] extern fn rust_eh_personality() {}
-#[lang = "panic_impl"] extern fn rust_begin_panic(_: &PanicInfo) -> ! { loop {} }
-
-#[no_mangle]
-pub unsafe fn _start() -> ! {
-	asm!(
-	"syscall",
-	in("rax") 60,  // Syscall number
-	in("rdi") 0,   // Exit code
-	options(noreturn)
-	)
-}