Start integrating BIOS bootloader into build system

We can use an artifact dependency on the outer level since the x86_64-unknown-none target is Tier 2 and thus requires no -Zbuild-std.

For the boot_sector, we need to compile with a specific linker script and profile. We might need to duplicate the profile settings in the boot_sector Cargo.toml when publishing.

Author: phil-opp

Cargo.lock

@@ -15,7 +15,7 @@ members = [
     "common",
     "uefi",
     "bios",
-    "bios/first_stage",
+    "bios/boot_sector",
     "tests/runner",
     "tests/test_kernels/default_settings",
     "tests/test_kernels/map_phys_mem",
@@ -30,20 +30,19 @@ anyhow = "1.0.32"
 fatfs = "0.3.4"
 gpt = "3.0.0"
 
+[dependencies.bootloader-x86_64-bios]
+version = "0.1.0-alpha.0"
+path = "bios"
+artifact = ["bin"]
+target = "x86_64-unknown-none"
+
 [dev-dependencies]
 bootloader_test_runner = { path = "tests/runner" }
 test_kernel_default_settings = { path = "tests/test_kernels/default_settings", artifact = "bin", target = "x86_64-unknown-none" }
 test_kernel_higher_half = { path = "tests/test_kernels/higher_half", artifact = "bin", target = "x86_64-unknown-none" }
 test_kernel_map_phys_mem = { path = "tests/test_kernels/map_phys_mem", artifact = "bin", target = "x86_64-unknown-none" }
 test_kernel_pie = { path = "tests/test_kernels/pie", artifact = "bin", target = "x86_64-unknown-none" }
 
-# [dependencies.bootloader-x86_64-uefi]
-# version = "0.1.0"
-# path = "uefi"
-# artifact = ["bin"]
-# target = "x86_64-unknown-uefi"
-
-
 [profile.dev]
 panic = "abort"
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bootloader-x86_64-bios"
-version = "0.1.0"
+version = "0.1.0-alpha.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

bios/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "bootloader_first_stage"
+name = "bootloader-x86_64-bios-boot-sector"
 version = "0.1.0"
 authors = ["Philipp Oppermann <[email protected]>"]
 edition = "2021"

bios/first_stage/.gitignore renamed to bios/boot_sector/.gitignore

@@ -0,0 +1,9 @@
+use std::path::Path;
+
+fn main() {
+    let local_path = Path::new(env!("CARGO_MANIFEST_DIR"));
+    println!(
+        "cargo:rustc-link-arg-bins=--script={}",
+        local_path.join("16-bit-linker.ld").display()
+    )
+}