mathieu/os
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Initial commit

Browse source
This commit is contained in:
Mathieu Strypsteen 2024-06-29 20:50:08 +02:00
commit b6b4854f71
15 changed files with 349 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
.gitignore vendored Normal file
View file

@ -0,0 +1,2 @@
img
target

22
LICENSE Normal file
View file

@ -0,0 +1,22 @@
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

16
build.sh Executable file
View file

@ -0,0 +1,16 @@
#!/bin/sh
set -e
rm -rf img
mkdir -p img/boot/efi/boot
cd kernel && cargo build --release && cd ..
cd loader && cargo build --release && cd ..
cp loader/target/x86_64-unknown-uefi/release/loader.efi img/boot/efi/boot/bootx64.efi
cd img
dd if=/dev/zero of=boot.img bs=1M count=16 status=none
mformat -i boot.img
mcopy -si boot.img boot/* ::
dd if=/dev/zero of=os.img bs=1M count=32 status=none
parted -s os.img mklabel gpt
parted -s os.img mkpart primary fat32 2048s 100%
parted -s os.img set 1 esp on
dd if=boot.img of=os.img bs=1M seek=1 conv=notrunc status=none

3
kernel/.cargo/config.toml Normal file
View file

@ -0,0 +1,3 @@
[build]
target = "x86_64-unknown-none"
rustflags = ["-C", "link-arg=link.ld"]

7
kernel/Cargo.lock generated Normal file
View file

@ -0,0 +1,7 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "kernel"
version = "0.0.1"

6
kernel/Cargo.toml Normal file
View file

@ -0,0 +1,6 @@
[package]
name = "kernel"
version = "0.0.1"
edition = "2021"
[dependencies]

15
kernel/link.ld Normal file
View file

@ -0,0 +1,15 @@
SECTIONS {
. = 0xffffffff80000000;
.text ALIGN(0x1000) : {
*(.text*)
}
.rodata ALIGN(0x1000) : {
*(.rodata*)
}
.data ALIGN(0x1000) : {
*(.data*)
}
.bss ALIGN(0x1000) : {
*(.bss*)
}
}

14
kernel/src/main.rs Normal file
View file

@ -0,0 +1,14 @@
#![no_std]
#![no_main]
use core::panic::PanicInfo;
#[no_mangle]
fn _start() {
loop {}
}
#[panic_handler]
fn panic(_info: &PanicInfo) -> ! {
loop {}
}

2
loader/.cargo/config.toml Normal file
View file

@ -0,0 +1,2 @@
[build]
target = "x86_64-unknown-uefi"

186
loader/Cargo.lock generated Normal file
View file

@ -0,0 +1,186 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "bit_field"
version = "0.10.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
[[package]]
name = "bitflags"
version = "2.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
[[package]]
name = "cfg-if"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "elf"
version = "0.7.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4445909572dbd556c457c849c4ca58623d84b27c8fff1e74b0b4227d8b90d17b"
[[package]]
name = "loader"
version = "0.0.1"
dependencies = [
"elf",
"log",
"uefi",
"x86_64",
]
[[package]]
name = "log"
version = "0.4.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
[[package]]
name = "proc-macro2"
version = "1.0.86"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
dependencies = [
"unicode-ident",
]
[[package]]
name = "ptr_meta"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bcada80daa06c42ed5f48c9a043865edea5dc44cbf9ac009fda3b89526e28607"
dependencies = [
"ptr_meta_derive",
]
[[package]]
name = "ptr_meta_derive"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bca9224df2e20e7c5548aeb5f110a0f3b77ef05f8585139b7148b59056168ed2"
dependencies = [
"proc-macro2",
"quote",
"syn 1.0.109",
]
[[package]]
name = "quote"
version = "1.0.36"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
dependencies = [
"proc-macro2",
]
[[package]]
name = "rustversion"
version = "1.0.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
[[package]]
name = "syn"
version = "1.0.109"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "syn"
version = "2.0.68"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "901fa70d88b9d6c98022e23b4136f9f3e54e4662c3bc1bd1d84a42a9a0f0c1e9"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "ucs2"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "df79298e11f316400c57ec268f3c2c29ac3c4d4777687955cd3d4f3a35ce7eba"
dependencies = [
"bit_field",
]
[[package]]
name = "uefi"
version = "0.28.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a9c0a56dc9fed2589aad6ddca11c2584968fc21f227b5d7083bb8961d26a69fa"
dependencies = [
"bitflags",
"cfg-if",
"log",
"ptr_meta",
"ucs2",
"uefi-macros",
"uefi-raw",
"uguid",
]
[[package]]
name = "uefi-macros"
version = "0.13.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "26a7b1c2c808c3db854a54d5215e3f7e7aaf5dcfbce095598cba6af29895695d"
dependencies = [
"proc-macro2",
"quote",
"syn 2.0.68",
]
[[package]]
name = "uefi-raw"
version = "0.5.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "efa8716f52e8cab8bcedfd5052388a0f263b69fe5cc2561548dc6a530678333c"
dependencies = [
"bitflags",
"ptr_meta",
"uguid",
]
[[package]]
name = "uguid"
version = "2.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ab14ea9660d240e7865ce9d54ecdbd1cd9fa5802ae6f4512f093c7907e921533"
[[package]]
name = "unicode-ident"
version = "1.0.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
[[package]]
name = "volatile"
version = "0.4.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "442887c63f2c839b346c192d047a7c87e73d0689c9157b00b53dcc27dd5ea793"
[[package]]
name = "x86_64"
version = "0.15.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4bc79523af8abf92fb1a970c3e086c5a343f6bcc1a0eb890f575cbb3b45743df"
dependencies = [
"bit_field",
"bitflags",
"rustversion",
"volatile",
]

10
loader/Cargo.toml Normal file
View file

@ -0,0 +1,10 @@
[package]
name = "loader"
version = "0.0.1"
edition = "2021"
[dependencies]
elf = {version = "0.7.4", default-features = false}
log = "0.4.21"
uefi = {version = "0.28.0", features = ["logger", "panic_handler"]}
x86_64 = {version = "0.15.1", default-features = false}

40
loader/src/elf.rs Normal file
View file

@ -0,0 +1,40 @@
use core::ptr;
use elf::{abi::PT_LOAD, endian::LittleEndian, ElfBytes};
use uefi::table::{
boot::{AllocateType, MemoryType},
Boot, SystemTable,
};
const KERNEL_VIRT_START: u64 = 0xffffffff80000000;
pub fn load_kernel(kernel: &[u8], system_table: &SystemTable<Boot>) {
let file: ElfBytes<LittleEndian> = ElfBytes::minimal_parse(kernel).unwrap();
let mut kernel_size = 0;
for i in file.segments().unwrap() {
if i.p_type != PT_LOAD {
continue;
}
if i.p_vaddr < KERNEL_VIRT_START {
panic!("Invalid kernel segments")
}
let end_addr = i.p_vaddr - KERNEL_VIRT_START + i.p_memsz;
if end_addr > kernel_size {
kernel_size = end_addr;
}
}
let phys_start = system_table
.boot_services()
.allocate_pages(AllocateType::AnyPages, MemoryType::LOADER_DATA, ((kernel_size + 0xfff) / 0x1000).try_into().unwrap())
.unwrap();
for i in file.segments().unwrap() {
if i.p_type != PT_LOAD {
continue;
}
let start_addr = i.p_vaddr - KERNEL_VIRT_START + phys_start;
unsafe {
ptr::write_bytes(start_addr as *mut u8, 0, i.p_memsz.try_into().unwrap());
ptr::copy(kernel[i.p_offset.try_into().unwrap()..].as_ptr(), start_addr as *mut u8, i.p_filesz.try_into().unwrap());
}
}
}

23
loader/src/main.rs Normal file
View file

@ -0,0 +1,23 @@
#![no_main]
#![no_std]
use elf::load_kernel;
use log::debug;
use uefi::{
entry,
table::{boot::MemoryType, Boot, SystemTable},
Handle, Status,
};
mod elf;
const KERNEL: &[u8] = include_bytes!("../../kernel/target/x86_64-unknown-none/release/kernel");
#[entry]
fn main(image_handle: Handle, mut system_table: SystemTable<Boot>) -> Status {
uefi::helpers::init(&mut system_table).unwrap();
debug!("Starting bootloader...");
load_kernel(KERNEL, &system_table);
let _memory_map = system_table.exit_boot_services(MemoryType::LOADER_DATA).1;
loop {}
}

2
rust-toolchain.toml Normal file
View file

@ -0,0 +1,2 @@
[toolchain]
targets = ["x86_64-unknown-none", "x86_64-unknown-uefi"]

1
rustfmt.toml Normal file
View file

@ -0,0 +1 @@
max_width = 200