diff --git a/.cargo/config.toml b/.cargo/config.toml
index dfa84e8..908feb8 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,2 +1,7 @@
 [unstable]
+# enable the unstable artifact-dependencies feature, see
+# https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#artifact-dependencies
 bindeps = true
+
+[target.x86-64-unknown-none]
+rustflags = ["-C", "force-unwind-tables", "-C", "link-args=/home/pterpstra/projects/os-rust/kernel/eh_frame.ld"] 
diff --git a/.gitignore b/.gitignore
index 4ffe2d4..2129704 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ initrd_path
 kernel_path
 out_dir_path
 capture.pcapng
+root.img
diff --git a/Cargo.lock b/Cargo.lock
index 37c9372..30eb0c7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,145 +14,12 @@ dependencies = [
  "zerocopy",
 ]
 
-[[package]]
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-version = "1.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "memchr",
-]
-
 [[package]]
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 checksum = "5c6cb57a04249c6480766f7f7cef5467412af1490f8d1e243141daddada3264f"
 
-[[package]]
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-
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- "futures-core",
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-]
-
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- "rustix 0.37.27",
- "slab",
- "socket2",
- "waker-fn",
-]
-
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- "cfg-if",
- "concurrent-queue",
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- "parking",
- "polling 3.7.2",
- "rustix 0.38.34",
- "slab",
- "tracing",
- "windows-sys 0.52.0",
-]
-
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-checksum = "287272293e9d8c41773cec55e365490fe034813a2f172f502d6ddcf75b2f582b"
-dependencies = [
- "event-listener 2.5.3",
-]
-
-[[package]]
-name = "async-lock"
-version = "3.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff6e472cdea888a4bd64f342f09b3f50e1886d32afe8df3d663c01140b811b18"
-dependencies = [
- "event-listener 5.3.1",
- "event-listener-strategy",
- "pin-project-lite",
-]
-
-[[package]]
-name = "async-process"
-version = "1.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea6438ba0a08d81529c69b36700fa2f95837bfe3e776ab39cde9c14d9149da88"
-dependencies = [
- "async-io 1.13.0",
- "async-lock 2.8.0",
- "async-signal",
- "blocking",
- "cfg-if",
- "event-listener 3.1.0",
- "futures-lite 1.13.0",
- "rustix 0.38.34",
- "windows-sys 0.48.0",
-]
-
-[[package]]
-name = "async-signal"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dfb3634b73397aa844481f814fad23bbf07fdb0eabec10f2eb95e58944b1ec32"
-dependencies = [
- "async-io 2.3.3",
- "async-lock 3.4.0",
- "atomic-waker",
- "cfg-if",
- "futures-core",
- "futures-io",
- "rustix 0.38.34",
- "signal-hook-registry",
- "slab",
- "windows-sys 0.52.0",
-]
-
-[[package]]
-name = "async-task"
-version = "4.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b75356056920673b02621b35afd0f7dda9306d03c79a30f5c56c44cf256e3de"
-
-[[package]]
-name = "atomic-waker"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
-
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -165,15 +32,6 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b7e4c2464d97fe331d41de9d5db0def0a96f4d823b8b32a2efd503578988973"
 
-[[package]]
-name = "bincode"
-version = "1.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "bit_field"
 version = "0.10.2"
@@ -192,59 +50,6 @@ version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
-[[package]]
-name = "bitvec"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
-dependencies = [
- "funty",
- "radium",
- "tap",
- "wyz",
-]
-
-[[package]]
-name = "blocking"
-version = "1.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "703f41c54fc768e63e091340b424302bb1c29ef4aa0c7f10fe849dfb114d29ea"
-dependencies = [
- "async-channel",
- "async-task",
- "futures-io",
- "futures-lite 2.3.0",
- "piper",
-]
-
-[[package]]
-name = "bootloader"
-version = "0.11.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "870f24755a97b8a8b436b243465eb7d4e1aa191369eeab062172eedd74493bcb"
-dependencies = [
- "anyhow",
- "async-process",
- "bootloader-boot-config",
- "fatfs",
- "futures",
- "futures-concurrency",
- "gpt",
- "llvm-tools",
- "mbrman",
- "serde_json",
- "tempfile",
-]
-
-[[package]]
-name = "bootloader-boot-config"
-version = "0.11.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4946b6c83b3e9bd91864531025a9719ed0d8c6e7c5db13f694152b5df7deea15"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "bootloader_api"
 version = "0.11.7"
@@ -260,39 +65,18 @@ dependencies = [
  "spin",
 ]
 
-[[package]]
-name = "byteorder"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
-
 [[package]]
 name = "cast"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
 
-[[package]]
-name = "cc"
-version = "1.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "504bdec147f2cc13c8b57ed9401fd8a147cc66b67ad5cb241394244f2c947549"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
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-name = "concurrent-queue"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
-dependencies = [
- "crossbeam-utils",
-]
-
 [[package]]
 name = "crc"
 version = "3.2.1"
@@ -334,255 +118,12 @@ dependencies = [
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 ]
 
-[[package]]
-name = "diatomic-waker"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92a510eb4dc7fa435297888c00e0f999aa2ee3e920a357221c35ab615a80bbcf"
-dependencies = [
- "loom",
- "waker-fn",
-]
-
 [[package]]
 name = "elf"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4445909572dbd556c457c849c4ca58623d84b27c8fff1e74b0b4227d8b90d17b"
 
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-version = "0.3.9"
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-checksum = "534c5cf6194dfab3db3242765c03bbe257cf92f22b38f6bc0c58d59108a820ba"
-dependencies = [
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- "windows-sys 0.52.0",
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-
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-
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-
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-
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-
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- "futures-macro",
- "futures-sink",
- "futures-task",
- "memchr",
- "pin-project-lite",
- "pin-utils",
- "slab",
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-
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- "cc",
- "libc",
- "log",
- "rustversion",
- "windows",
-]
-
 [[package]]
 name = "getrandom"
 version = "0.2.15"
@@ -602,13 +143,13 @@ checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
 
 [[package]]
 name = "gpt"
-version = "3.1.0"
+version = "4.0.0-rc.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8283e7331b8c93b9756e0cfdbcfb90312852f953c6faf9bf741e684cc3b6ad69"
+checksum = "94039daf850fd835e0c4891317978feea3e5a9d5cb7aaa073a8d6d2123b43e1b"
 dependencies = [
  "bitflags 2.6.0",
  "crc",
- "log",
+ "simple-bytes",
  "uuid",
 ]
 
@@ -622,18 +163,6 @@ dependencies = [
  "allocator-api2",
 ]
 
-[[package]]
-name = "hermit-abi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
 name = "humansize"
 version = "2.1.3"
@@ -643,15 +172,6 @@ dependencies = [
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 ]
 
-[[package]]
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-version = "0.1.13"
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-dependencies = [
- "cfg-if",
-]
-
 [[package]]
 name = "intrusive-collections"
 version = "0.9.6"
@@ -661,23 +181,6 @@ dependencies = [
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 ]
 
-[[package]]
-name = "io-lifetimes"
-version = "1.0.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
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- "libc",
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-
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-checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
-
 [[package]]
 name = "kernel"
 version = "0.1.0"
@@ -706,12 +209,6 @@ dependencies = [
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 ]
 
-[[package]]
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diff --git a/Cargo.toml b/Cargo.toml
index 437d3dc..38fde84 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ edition = "2021"
 resolver = "2"
 
 [build-dependencies]
-bootloader = { version = "0.11.7" }
+gpt = "4.0.0-rc.3"
 kernel = { path = "../kernel", artifact = "bin", target = "x86_64-unknown-none" }
 
 [dependencies]
@@ -17,9 +17,9 @@ panic = "abort"
 
 [profile.release]
 panic = "abort"
-strip = false
-debug = 2
+lto = true
 
-# [workspace]
-# members = ["kernel", "init", "test_proc", "toolchain_test"]
-# exclude = ["x86_64", "rust"]
+[profile.release.package.kernel]
+strip = true
+opt-level = "z"
+codegen-units=1
diff --git a/bootloader-x86_64-uefi.efi b/bootloader-x86_64-uefi.efi
new file mode 100755
index 0000000..da1f281
Binary files /dev/null and b/bootloader-x86_64-uefi.efi differ
diff --git a/build.rs b/build.rs
index 8e7db89..77eb826 100644
--- a/build.rs
+++ b/build.rs
@@ -1,54 +1,167 @@
 use std::{
+    env,
+    fs,
     os::unix::ffi::OsStrExt,
-    path::{Path, PathBuf},
+    path::PathBuf,
     process::Command,
 };
 
-extern crate bootloader;
+use gpt::{mbr::ProtectiveMBR, GptConfig};
 
-use bootloader::{BiosBoot, UefiBoot};
+const ROOT_DISK_SIZE_MB: usize = 256;
 
 fn main() {
     println!("cargo:rerun-if-changed=sysroot");
     println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed=initrd_file_list");
+    println!("cargo:rerun-if-changed=bootloader-x86_64-uefi.efi");
 
     // set by cargo, build scripts should use this directory for output files
     let out_dir = std::env::var_os("OUT_DIR").unwrap();
 
+    std::fs::write("out_dir_path", out_dir.as_os_str().as_bytes()).unwrap();
+
     let mut initrd_path = out_dir.clone();
     initrd_path.push("/initrd.tar");
-    Command::new("sh")
+    Command::new("bash")
         .arg("-c")
-        .arg(format!("cd sysroot; tar cvf {:?} *", initrd_path))
-        .spawn()
-        .unwrap()
-        .wait()
+        .arg(format!(
+            "cd sysroot; tar cvf {:?} $(cat ../initrd_file_list)",
+            initrd_path
+        ))
+        .output()
         .unwrap();
 
-    // set by cargo's artifact dependency feature, see
-    // https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#artifact-dependencies
-    let kernel = PathBuf::from(std::env::var_os("CARGO_BIN_FILE_KERNEL_kernel").unwrap());
+    let kernel = PathBuf::from(env::var_os("CARGO_BIN_FILE_KERNEL_kernel").unwrap());
 
-    // create an UEFI disk image (optional)
-    let mut uefi_path = out_dir.clone();
-    uefi_path.push("/uefi.img");
-    UefiBoot::new(&kernel)
-        .set_ramdisk(Path::new(&initrd_path))
-        .create_disk_image(Path::new(&uefi_path))
+    let mut disk_path = out_dir.clone();
+    disk_path.push("/root.img");
+
+    Command::new("dd")
+        .arg("if=/dev/zero")
+        .arg(format!("of={}", disk_path.to_str().unwrap()))
+        .arg("bs=1M")
+        .arg(format!("count={}", ROOT_DISK_SIZE_MB))
+        .output()
         .unwrap();
 
-    // create a BIOS disk image (optional)
-    let mut bios_path = out_dir.clone();
-    bios_path.push("/bios.img");
-    BiosBoot::new(&kernel)
-        .set_ramdisk(Path::new(&initrd_path))
-        .create_disk_image(Path::new(&bios_path))
+    let mut disk = GptConfig::new().writable(true).create(&disk_path).unwrap();
+
+    ProtectiveMBR::new()
+        .overwrite_lba0(disk.device_mut())
         .unwrap();
 
-    println!("cargo:rustc-env=UEFI_PATH={}", uefi_path.to_string_lossy());
-    println!("cargo:rustc-env=BIOS_PATH={}", bios_path.to_string_lossy());
+    let boot_part_id = disk
+        .add_partition("boot", 32 * 1024 * 1024, gpt::partition_types::EFI, 0, None)
+        .unwrap();
+    let root_part_id = disk
+        .add_partition(
+            "root",
+            disk.find_free_sectors()[1].1 * disk.logical_block_size().as_u64(),
+            gpt::partition_types::LINUX_FS,
+            0,
+            None,
+        )
+        .unwrap();
 
-    std::fs::write("kernel_path", kernel.as_os_str().as_bytes()).unwrap();
-    std::fs::write("initrd_path", initrd_path.as_os_str().as_bytes()).unwrap();
-    std::fs::write("out_dir_path", out_dir.as_bytes()).unwrap();
+    disk.write_inplace().unwrap();
+
+    let boot_part = &disk.partitions()[&boot_part_id];
+    let root_part = &disk.partitions()[&root_part_id];
+
+    Command::new("dd")
+        .arg(format!("if={}", disk_path.to_str().unwrap()))
+        .arg("of=tmp_ext2.img")
+        .arg(format!("bs={}", disk.logical_block_size().as_u64()))
+        .arg(format!("skip={}", root_part.first_lba))
+        .arg(format!("count={}", root_part.sectors_len().unwrap()))
+        .output()
+        .unwrap();
+
+    Command::new("mkfs.ext2")
+        .arg("-O")
+        .arg("^resize_inode")
+        .arg("-d")
+        .arg("sysroot")
+        .arg("tmp_ext2.img")
+        .output()
+        .unwrap();
+
+    Command::new("dd")
+        .arg("if=tmp_ext2.img")
+        .arg(format!("of={}", disk_path.to_str().unwrap()))
+        .arg(format!("bs={}", disk.logical_block_size().as_u64()))
+        .arg(format!("seek={}", root_part.first_lba))
+        .arg("conv=notrunc")
+        .output()
+        .unwrap();
+
+    fs::remove_file("tmp_ext2.img").unwrap();
+
+    Command::new("dd")
+        .arg(format!("if={}", disk_path.to_str().unwrap()))
+        .arg("of=tmp_esp.img")
+        .arg(format!("bs={}", disk.logical_block_size().as_u64()))
+        .arg(format!("skip={}", boot_part.first_lba))
+        .arg(format!("count={}", boot_part.sectors_len().unwrap()))
+        .output()
+        .unwrap();
+
+    Command::new("mkfs.fat")
+        .arg("-g")
+        .arg("64/32")
+        .arg("-i")
+        .arg("12345678")
+        .arg("-n")
+        .arg("kernel-bd3a")
+        .arg("tmp_esp.img")
+        .output()
+        .unwrap();
+
+    Command::new("mmd")
+        .arg("-i")
+        .arg("tmp_esp.img")
+        .arg("efi")
+        .output()
+        .unwrap();
+    Command::new("mmd")
+        .arg("-i")
+        .arg("tmp_esp.img")
+        .arg("efi/boot")
+        .output()
+        .unwrap();
+    Command::new("mcopy")
+        .arg("-i")
+        .arg("tmp_esp.img")
+        .arg("bootloader-x86_64-uefi.efi")
+        .arg("::efi/boot/bootx64.efi")
+        .output()
+        .unwrap();
+    Command::new("mcopy")
+        .arg("-i")
+        .arg("tmp_esp.img")
+        .arg(&kernel)
+        .arg("::kernel-x86_64")
+        .output()
+        .unwrap();
+    Command::new("mcopy")
+        .arg("-i")
+        .arg("tmp_esp.img")
+        .arg(&initrd_path)
+        .arg("::ramdisk")
+        .output()
+        .unwrap();
+
+    Command::new("dd")
+        .arg("if=tmp_esp.img")
+        .arg(format!("of={}", disk_path.to_str().unwrap()))
+        .arg(format!("bs={}", disk.logical_block_size().as_u64()))
+        .arg(format!("seek={}", boot_part.first_lba))
+        .arg("conv=notrunc")
+        .output()
+        .unwrap();
+
+    fs::remove_file("tmp_esp.img").unwrap();
+
+    println!("cargo:rustc-env=DISK_PATH={}", disk_path.to_string_lossy());
 }
diff --git a/ext2.img b/ext2.img
deleted file mode 100644
index ddd3c11..0000000
Binary files a/ext2.img and /dev/null differ
diff --git a/initrd_file_list b/initrd_file_list
new file mode 100644
index 0000000..fbe6345
--- /dev/null
+++ b/initrd_file_list
@@ -0,0 +1,11 @@
+bin/init
+bin/syslog
+bin/vfs
+bin/devfs
+bin/tarfs
+bin/initrd_driver
+bin/pci
+bin/partserv
+bin/ext2
+bin/ahci
+etc/pci_config
diff --git a/src/main.rs b/src/main.rs
index 692ec29..2965faf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,5 @@
 fn main() {
-    // read env variables that were set in build script
-    let uefi_path = env!("UEFI_PATH");
-    //let bios_path = env!("BIOS_PATH");
+    let disk_path = env!("DISK_PATH");
 
     let mut cmd = std::process::Command::new("qemu-system-x86_64");
     cmd.arg("-nographic");
@@ -16,16 +14,9 @@ fn main() {
     cmd.arg("-device").arg("ahci,id=ahci");
     //cmd.arg("-device").arg("VGA");
     cmd.arg("-blockdev").arg(format!(
-        "driver=raw,node-name=boot,file.driver=file,file.filename={uefi_path}"
+        "driver=raw,node-name=disk,file.driver=file,file.filename={disk_path}"
     ));
-    //cmd.arg("-blockdev").arg(format!(
-    //    "driver=raw,node-name=boot,file.driver=file,file.filename={bios_path}"
-    //));
-    cmd.arg("-device").arg("ide-hd,drive=boot,bus=ahci.0");
-    cmd.arg("-blockdev").arg(format!(
-        "driver=raw,node-name=fs,file.driver=file,file.filename=ext2.img"
-    ));
-    cmd.arg("-device").arg("ide-hd,drive=fs,bus=ahci.1");
+    cmd.arg("-device").arg("ide-hd,drive=disk,bus=ahci.0");
     cmd.arg("-device")
         .arg("isa-debug-exit,iobase=0xf4,iosize=0x04");
     let mut child = cmd.spawn().unwrap();