init
This commit is contained in:
mtgmonkey
commit
2190a5c04d
18 changed files with 745 additions and 0 deletions
5
.cargo/config.toml
Normal file
5
.cargo/config.toml
Normal file
|
|
@ -0,0 +1,5 @@
|
|||
[build]
|
||||
target = "x86_64-rustboot.json" # target OS specifications
|
||||
|
||||
[unstable]
|
||||
build-std = ["core", "compiler_builtins"] # recompile these
|
||||
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
|
|
@ -0,0 +1 @@
|
|||
/target
|
||||
108
Cargo.lock
generated
Normal file
108
Cargo.lock
generated
Normal file
|
|
@ -0,0 +1,108 @@
|
|||
# This file is automatically @generated by Cargo.
|
||||
# It is not intended for manual editing.
|
||||
version = 3
|
||||
|
||||
[[package]]
|
||||
name = "autocfg"
|
||||
version = "1.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
|
||||
|
||||
[[package]]
|
||||
name = "bit_field"
|
||||
version = "0.10.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
|
||||
|
||||
[[package]]
|
||||
name = "bitflags"
|
||||
version = "2.9.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
|
||||
|
||||
[[package]]
|
||||
name = "lazy_static"
|
||||
version = "1.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
|
||||
dependencies = [
|
||||
"spin 0.9.8",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "lock_api"
|
||||
version = "0.4.12"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "07af8b9cdd281b7915f413fa73f29ebd5d55d0d3f0155584dade1ff18cea1b17"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
"scopeguard",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rlibc"
|
||||
version = "1.0.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "fc874b127765f014d792f16763a81245ab80500e2ad921ed4ee9e82481ee08fe"
|
||||
|
||||
[[package]]
|
||||
name = "rustboot"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"lazy_static",
|
||||
"rlibc",
|
||||
"spin 0.10.0",
|
||||
"volatile 0.3.0",
|
||||
"x86_64",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rustversion"
|
||||
version = "1.0.20"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
|
||||
|
||||
[[package]]
|
||||
name = "scopeguard"
|
||||
version = "1.2.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
|
||||
|
||||
[[package]]
|
||||
name = "spin"
|
||||
version = "0.9.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
|
||||
|
||||
[[package]]
|
||||
name = "spin"
|
||||
version = "0.10.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d5fe4ccb98d9c292d56fec89a5e07da7fc4cf0dc11e156b41793132775d3e591"
|
||||
dependencies = [
|
||||
"lock_api",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "volatile"
|
||||
version = "0.3.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f8e76fae08f03f96e166d2dfda232190638c10e0383841252416f9cfe2ae60e6"
|
||||
|
||||
[[package]]
|
||||
name = "volatile"
|
||||
version = "0.4.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "442887c63f2c839b346c192d047a7c87e73d0689c9157b00b53dcc27dd5ea793"
|
||||
|
||||
[[package]]
|
||||
name = "x86_64"
|
||||
version = "0.15.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0f042214de98141e9c8706e8192b73f56494087cc55ebec28ce10f26c5c364ae"
|
||||
dependencies = [
|
||||
"bit_field",
|
||||
"bitflags",
|
||||
"rustversion",
|
||||
"volatile 0.4.6",
|
||||
]
|
||||
24
Cargo.toml
Normal file
24
Cargo.toml
Normal file
|
|
@ -0,0 +1,24 @@
|
|||
[package]
|
||||
name = "rustboot"
|
||||
version = "0.1.0"
|
||||
edition = "2024"
|
||||
authors = ["mtgmonkey"]
|
||||
|
||||
[lib]
|
||||
crate-type = ["staticlib"] # library that contains all dependencies
|
||||
|
||||
[dependencies]
|
||||
rlibc = "1.0"
|
||||
spin = "0.10"
|
||||
volatile = "0.3" # newest functional version
|
||||
x86_64 = "0.15"
|
||||
|
||||
[dependencies.lazy_static]
|
||||
version = "1.5"
|
||||
features = ["spin_no_std"]
|
||||
|
||||
#[profile.dev]
|
||||
#panic = "abort"
|
||||
|
||||
#[profile.release]
|
||||
#panic = "abort"
|
||||
35
Cargo.toml.0
Normal file
35
Cargo.toml.0
Normal file
|
|
@ -0,0 +1,35 @@
|
|||
[package]
|
||||
name = "rustos"
|
||||
version = "0.1.0"
|
||||
edition = "2024"
|
||||
authors = [ "mtgmonkey" ]
|
||||
|
||||
# Special debug shutdown device in QEMU
|
||||
[package.metadata.bootimage]
|
||||
test-args = ["-device", "isa-debug-exit,iobase=0xf4,iosize=0x04",
|
||||
"-serial", "stdio",
|
||||
"-display", "none"]
|
||||
test-success-exit-code = 33 # (0x10 << 1) | 1
|
||||
test-timeout = 30 # in seconds
|
||||
|
||||
[dependencies]
|
||||
bootloader = { version = "0.9", features = ["map_physical_memory"] }
|
||||
linked_list_allocator = "0.9.0"
|
||||
pc-keyboard = "0.7.0"
|
||||
pic8259 = "0.10.1"
|
||||
spin = "0.5.2"
|
||||
uart_16550 = "0.2.0"
|
||||
volatile = "0.2.6"
|
||||
x86_64 = "0.14.2"
|
||||
|
||||
[dependencies.lazy_static]
|
||||
version = "1.0"
|
||||
features = ["spin_no_std"]
|
||||
|
||||
[[test]]
|
||||
name = "should_panic"
|
||||
harness = false
|
||||
|
||||
[[test]]
|
||||
name = "stack_overflow"
|
||||
harness = false
|
||||
24
Makefile
Normal file
24
Makefile
Normal file
|
|
@ -0,0 +1,24 @@
|
|||
all:
|
||||
mkdir temp
|
||||
nasm -f elf64 src/multiboot_header.asm -o temp/multiboot_header.asm.o
|
||||
nasm -f elf64 src/long_mode_init.asm -o temp/long_mode_init.asm.o
|
||||
nasm -f elf64 src/boot.asm -o temp/boot.asm.o
|
||||
echo "Run 'RUST_TARGET_PATH=<dollar>(pwd)"
|
||||
cargo update --verbose
|
||||
cargo build --target x86_64-rustboot
|
||||
ld -n -o temp/kernel.bin --gc-sections -T linker.ld temp/multiboot_header.asm.o temp/long_mode_init.asm.o temp/boot.asm.o target/x86_64-rustboot/debug/librustboot.a
|
||||
mkdir isofiles
|
||||
mkdir isofiles/boot
|
||||
mkdir isofiles/boot/grub
|
||||
cp temp/kernel.bin isofiles/boot/kernel.bin
|
||||
cp src/grub.cfg isofiles/boot/grub/grub.cfg
|
||||
rm -rf temp
|
||||
grub-mkrescue -o build/os.iso isofiles 2> /dev/null
|
||||
rm -rf isofiles
|
||||
|
||||
clean:
|
||||
rm -rf temp
|
||||
rm -rf isofiles
|
||||
|
||||
run:
|
||||
qemu-system-x86_64 -cdrom build/os.iso
|
||||
BIN
build/os.iso
Normal file
BIN
build/os.iso
Normal file
Binary file not shown.
62
flake.lock
generated
Normal file
62
flake.lock
generated
Normal file
|
|
@ -0,0 +1,62 @@
|
|||
{
|
||||
"nodes": {
|
||||
"nixpkgs": {
|
||||
"locked": {
|
||||
"lastModified": 1746576598,
|
||||
"narHash": "sha256-FshoQvr6Aor5SnORVvh/ZdJ1Sa2U4ZrIMwKBX5k2wu0=",
|
||||
"owner": "NixOS",
|
||||
"repo": "nixpkgs",
|
||||
"rev": "b3582c75c7f21ce0b429898980eddbbf05c68e55",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "NixOS",
|
||||
"ref": "nixpkgs-unstable",
|
||||
"repo": "nixpkgs",
|
||||
"type": "github"
|
||||
}
|
||||
},
|
||||
"nixpkgs_2": {
|
||||
"locked": {
|
||||
"lastModified": 1744536153,
|
||||
"narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
|
||||
"owner": "NixOS",
|
||||
"repo": "nixpkgs",
|
||||
"rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "NixOS",
|
||||
"ref": "nixpkgs-unstable",
|
||||
"repo": "nixpkgs",
|
||||
"type": "github"
|
||||
}
|
||||
},
|
||||
"root": {
|
||||
"inputs": {
|
||||
"nixpkgs": "nixpkgs",
|
||||
"rust-overlay": "rust-overlay"
|
||||
}
|
||||
},
|
||||
"rust-overlay": {
|
||||
"inputs": {
|
||||
"nixpkgs": "nixpkgs_2"
|
||||
},
|
||||
"locked": {
|
||||
"lastModified": 1747103809,
|
||||
"narHash": "sha256-a3Yk+CoFmNw7V8J/si/AM8WuI/qTxQhiJpuQ7HFl774=",
|
||||
"owner": "oxalica",
|
||||
"repo": "rust-overlay",
|
||||
"rev": "fe36c63649875f391949e8b2ec33949d0cd8aa95",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "oxalica",
|
||||
"repo": "rust-overlay",
|
||||
"type": "github"
|
||||
}
|
||||
}
|
||||
},
|
||||
"root": "root",
|
||||
"version": 7
|
||||
}
|
||||
34
flake.nix
Normal file
34
flake.nix
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
{
|
||||
description = "Rust shells";
|
||||
|
||||
inputs = {
|
||||
nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
|
||||
rust-overlay.url = "github:oxalica/rust-overlay";
|
||||
};
|
||||
|
||||
outputs = inputs @ {...}: let
|
||||
additionalPackages = [
|
||||
pkgs.qemu
|
||||
pkgs.xorriso
|
||||
];
|
||||
pkgs = import inputs.nixpkgs {
|
||||
system = "x86_64-linux";
|
||||
overlays = [(import inputs.rust-overlay)];
|
||||
};
|
||||
|
||||
rustup = {
|
||||
package = pkgs.rustup;
|
||||
path = "${pkgs.rustup}/lib/rustlib.src/rust/library";
|
||||
};
|
||||
in {
|
||||
devShell.x86_64-linux = pkgs.mkShell {
|
||||
packages = [
|
||||
rustup.package
|
||||
additionalPackages
|
||||
];
|
||||
env = {
|
||||
RUST_SRC_PATH = rustup.path;
|
||||
};
|
||||
};
|
||||
};
|
||||
}
|
||||
24
justfile
Normal file
24
justfile
Normal file
|
|
@ -0,0 +1,24 @@
|
|||
all:
|
||||
mkdir temp
|
||||
nasm -f elf64 src/multiboot_header.asm -o temp/multiboot_header.asm.o
|
||||
nasm -f elf64 src/long_mode_init.asm -o temp/long_mode_init.asm.o
|
||||
nasm -f elf64 src/boot.asm -o temp/boot.asm.o
|
||||
cargo update --verbose
|
||||
cargo build
|
||||
ld -n -o temp/kernel.bin --gc-sections -T linker.ld temp/multiboot_header.asm.o temp/long_mode_init.asm.o temp/boot.asm.o target/x86_64-rustboot/debug/librustboot.a
|
||||
mkdir isofiles
|
||||
mkdir isofiles/boot
|
||||
mkdir isofiles/boot/grub
|
||||
cp temp/kernel.bin isofiles/boot/kernel.bin
|
||||
cp src/grub.cfg isofiles/boot/grub/grub.cfg
|
||||
rm -rf temp
|
||||
grub-mkrescue -o build/os.iso isofiles 2> /dev/null
|
||||
rm -rf isofiles
|
||||
|
||||
clean:
|
||||
rm -rf temp
|
||||
rm -rf isofiles
|
||||
rm -rf target
|
||||
|
||||
run:
|
||||
qemu-system-x86_64 -cdrom build/os.iso
|
||||
12
linker.ld
Normal file
12
linker.ld
Normal file
|
|
@ -0,0 +1,12 @@
|
|||
ENTRY(start)
|
||||
SECTIONS {
|
||||
. = 1M;
|
||||
.boot :
|
||||
{
|
||||
KEEP(*(.multiboot_header))
|
||||
}
|
||||
.text :
|
||||
{
|
||||
*(.text)
|
||||
}
|
||||
}
|
||||
143
src/boot.asm
Normal file
143
src/boot.asm
Normal file
|
|
@ -0,0 +1,143 @@
|
|||
global start
|
||||
|
||||
extern long_mode_start
|
||||
|
||||
section .text
|
||||
bits 32
|
||||
|
||||
start:
|
||||
mov esp, stack_top ; stack
|
||||
mov edi, ebx ; move multiboot pointer to edi
|
||||
|
||||
; error suite
|
||||
call check_multiboot
|
||||
call check_cpuid
|
||||
call check_long_mode
|
||||
|
||||
; paging
|
||||
call set_up_page_tables
|
||||
call enable_paging
|
||||
|
||||
; 64-bit gdt
|
||||
lgdt [gdt64.pointer]
|
||||
jmp gdt64.code:long_mode_start ; change cs to gdt64 and long jump
|
||||
|
||||
set_up_page_tables:
|
||||
mov eax, p3_table ; map p3_table's address to the first entry in p4_table
|
||||
or eax, 0b11 ; present, writable
|
||||
mov [p4_table], eax ; p4_table's first entry points to p3_table
|
||||
|
||||
mov eax, p2_table ; sim.
|
||||
or eax, 0b11
|
||||
mov [p3_table], eax
|
||||
|
||||
mov ecx, 0 ; counter
|
||||
.map_p2_table:
|
||||
mov eax, 0x200000 ; 2MiB for a huge page
|
||||
mul ecx ; destination is ax register
|
||||
or eax, 0b10000011 ; huge ..... present, writable
|
||||
mov [p2_table + ecx * 8], eax ; map entry
|
||||
|
||||
inc ecx ; scuffed for-loop section
|
||||
cmp ecx, 512
|
||||
jne .map_p2_table
|
||||
|
||||
ret
|
||||
|
||||
enable_paging:
|
||||
mov eax, p4_table
|
||||
mov cr3, eax ; load p4_table to cr3, where it lives
|
||||
|
||||
mov eax, cr4
|
||||
or eax, 1 << 5
|
||||
mov cr4, eax ; set PAE flag in cr4
|
||||
|
||||
mov ecx, 0xC0000080
|
||||
rdmsr
|
||||
or eax, 1 << 8
|
||||
wrmsr ; set long bit in MSR
|
||||
|
||||
mov eax, cr0
|
||||
or eax, 1 << 31
|
||||
mov cr0, eax ; set paging bit in cr0
|
||||
ret
|
||||
|
||||
; # | error
|
||||
; 0 | .no_multiboot
|
||||
; 1 | .no_cpuid
|
||||
; 2 | .no_long_mode
|
||||
error: ; prints RE:R <al>. <al> is used to store error codes
|
||||
mov dword [0xb8000], 0x4f524f45
|
||||
mov dword [0xb8004], 0x4f3a4f52
|
||||
mov dword [0xb8008], 0x4f204f20
|
||||
mov byte [0xb800a], al
|
||||
hlt
|
||||
|
||||
check_multiboot:
|
||||
cmp eax, 0x36d76289 ; eax magic value
|
||||
jne .no_multiboot
|
||||
ret
|
||||
.no_multiboot:
|
||||
mov al, "0"
|
||||
jmp error
|
||||
|
||||
check_cpuid: ; check if cpuid flag is supported
|
||||
pushfd
|
||||
pop eax ; put flags into eax
|
||||
|
||||
mov ecx, eax ; copy to ecx
|
||||
xor eax, 1 << 21 ; flip the ID bit
|
||||
|
||||
push eax
|
||||
popfd ; return eax to flags
|
||||
|
||||
pushfd
|
||||
pop eax ; put flags to eax again
|
||||
|
||||
push ecx
|
||||
popfd ; restore flags to old version
|
||||
|
||||
cmp eax, ecx
|
||||
je .no_cpuid
|
||||
ret
|
||||
.no_cpuid:
|
||||
mov al, "1"
|
||||
jmp error
|
||||
|
||||
check_long_mode: ; checks ensure cpu is new enough to be 64 bit
|
||||
mov eax, 0x80000000
|
||||
cpuid
|
||||
cmp eax, 0x80000001
|
||||
jb .no_long_mode
|
||||
|
||||
mov eax, 0x80000001
|
||||
cpuid
|
||||
test edx, 1 << 29
|
||||
jz .no_long_mode
|
||||
ret
|
||||
.no_long_mode:
|
||||
mov al, "2"
|
||||
jmp error
|
||||
|
||||
section .bss ; GRUB initialises this to 0
|
||||
|
||||
align 4096 ; tables must be aligned
|
||||
p4_table:
|
||||
resb 4096
|
||||
p3_table:
|
||||
resb 4096
|
||||
p2_table:
|
||||
resb 4096
|
||||
|
||||
stack_bottom:
|
||||
resb 4096 * 4 ; 16kB
|
||||
stack_top:
|
||||
|
||||
section .rodata
|
||||
gdt64:
|
||||
dq 0 ; null
|
||||
.code: equ $ - gdt64 ; code offset
|
||||
dq (1 << 43) | (1 << 44) | (1 << 47) | (1 << 53) ; code
|
||||
.pointer:
|
||||
dw $ - gdt64 - 1 ; $ is .pointer here; length of gdt
|
||||
dq gdt64 ; pointer to gdt table
|
||||
7
src/grub.cfg
Normal file
7
src/grub.cfg
Normal file
|
|
@ -0,0 +1,7 @@
|
|||
set timeout=0
|
||||
set default=0
|
||||
|
||||
menuentry "rustos_boot" {
|
||||
multiboot2 /boot/kernel.bin
|
||||
boot
|
||||
}
|
||||
26
src/lib.rs
Normal file
26
src/lib.rs
Normal file
|
|
@ -0,0 +1,26 @@
|
|||
#![no_std]
|
||||
|
||||
extern crate rlibc;
|
||||
|
||||
mod vga_buffer;
|
||||
|
||||
use core::panic::PanicInfo;
|
||||
|
||||
pub fn halt() -> ! {
|
||||
println!("we've halted");
|
||||
loop {
|
||||
x86_64::instructions::hlt();
|
||||
}
|
||||
}
|
||||
|
||||
#[unsafe(no_mangle)]
|
||||
pub extern "C" fn rust_main(_multiboot_information_address: usize) {
|
||||
println!("Hello World!");
|
||||
halt()
|
||||
}
|
||||
|
||||
#[panic_handler]
|
||||
pub fn panic(info: &PanicInfo) -> ! {
|
||||
println!("Panic happened: {}", info);
|
||||
halt()
|
||||
}
|
||||
19
src/long_mode_init.asm
Normal file
19
src/long_mode_init.asm
Normal file
|
|
@ -0,0 +1,19 @@
|
|||
global long_mode_start
|
||||
|
||||
section .text
|
||||
bits 64
|
||||
|
||||
long_mode_start:
|
||||
mov ax, 0
|
||||
mov ss, ax
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
|
||||
extern rust_main ; make the jump to Rust!
|
||||
call rust_main
|
||||
|
||||
mov rax, 0x2f592f412f4b2f4f
|
||||
mov qword [0xb8000], rax
|
||||
hlt
|
||||
15
src/multiboot_header.asm
Normal file
15
src/multiboot_header.asm
Normal file
|
|
@ -0,0 +1,15 @@
|
|||
section .multiboot_header
|
||||
header_start:
|
||||
dd 0xe85250d6 ; magic number multiboot 2
|
||||
dd 0 ; magic number protected mode i386
|
||||
dd header_end - header_start ; header length
|
||||
; checksum
|
||||
dd 0x100000000 - (0xe85250d6 + 0 + (header_end - header_start))
|
||||
|
||||
; multiboot tags
|
||||
|
||||
; end tag
|
||||
dw 0 ; type
|
||||
dw 0 ; flags
|
||||
dd 8 ; size
|
||||
header_end:
|
||||
188
src/vga_buffer.rs
Normal file
188
src/vga_buffer.rs
Normal file
|
|
@ -0,0 +1,188 @@
|
|||
use core::fmt;
|
||||
use lazy_static::lazy_static;
|
||||
use spin::Mutex;
|
||||
use volatile::Volatile;
|
||||
|
||||
// macro print ::: prints to vga_buffer
|
||||
#[macro_export]
|
||||
macro_rules! print {
|
||||
($($arg:tt)*) => ($crate::vga_buffer::_print(format_args!($($arg)*)));
|
||||
}
|
||||
|
||||
// macro println ::: prints to vga_buffer with \n appended
|
||||
#[macro_export]
|
||||
macro_rules! println {
|
||||
() => ($crate::print!("\n"));
|
||||
($($arg:tt)*) => ($crate::print!("{}\n", format_args!($($arg)*)));
|
||||
}
|
||||
|
||||
// enum Color ::: defines color bytes for VGA buffer as u8
|
||||
#[allow(dead_code)]
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
#[repr(u8)]
|
||||
pub enum Color {
|
||||
Black = 0,
|
||||
Blue = 1,
|
||||
Green = 2,
|
||||
Cyan = 3,
|
||||
Red = 4,
|
||||
Magenta = 5,
|
||||
Brown = 6,
|
||||
LightGray = 7,
|
||||
DarkGray = 8,
|
||||
LightBlue = 9,
|
||||
LightGreen = 10,
|
||||
LightCyan = 11,
|
||||
LightRed = 12,
|
||||
Pink = 13,
|
||||
Yellow = 14,
|
||||
White = 15,
|
||||
}
|
||||
|
||||
// const BUFFER_HEIGHT :::
|
||||
// const BUFFER_WIDTH :::
|
||||
const BUFFER_HEIGHT: usize = 25;
|
||||
const BUFFER_WIDTH: usize = 80;
|
||||
|
||||
// struct Buffer :::
|
||||
// chars: [[Volatile<ScreenChar>; BUFFER_WIDTH]; BUFFER_HEIGHT] :field: char array of text buffer.
|
||||
// Volatile ensures it'll never be optimized away because this buffer is a side effect
|
||||
#[repr(transparent)]
|
||||
struct Buffer {
|
||||
chars: [[Volatile<ScreenChar>; BUFFER_WIDTH]; BUFFER_HEIGHT],
|
||||
}
|
||||
|
||||
// struct ColorCode ::: formatted for VGA buffer; first 4 foreground, last 4 background
|
||||
// (u8) :field:
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
#[repr(transparent)]
|
||||
struct ColorCode(u8);
|
||||
|
||||
impl ColorCode {
|
||||
// fn new ::: creates color code to VGA specs
|
||||
// foreground: Color :param:
|
||||
// background: Color :param:
|
||||
// : ColorCode :ret:
|
||||
fn new(foreground: Color, background: Color) -> ColorCode {
|
||||
ColorCode((background as u8) << 4 | (foreground as u8))
|
||||
}
|
||||
}
|
||||
|
||||
// struct ScreenChar ::: specifies character and color of 1 character for VGA buffer
|
||||
// ascii_character: u8 :field:
|
||||
// color_code: ColorCode :field:
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
#[repr(C)]
|
||||
struct ScreenChar {
|
||||
ascii_character: u8,
|
||||
color_code: ColorCode,
|
||||
}
|
||||
|
||||
// struct Writer :::
|
||||
// column_position: usize :field:
|
||||
// color_code: ColorCode :field:
|
||||
// buffer: &'static mut Buffer :field: buffer to write to
|
||||
pub struct Writer {
|
||||
column_position: usize,
|
||||
color_code: ColorCode,
|
||||
buffer: &'static mut Buffer,
|
||||
}
|
||||
|
||||
impl Writer {
|
||||
// fn write_byte ::: writes byte to screen
|
||||
// &mut self :param: self whose buffer will be written to
|
||||
// byte: u8 :param: byte to write to screen. Must be writable
|
||||
pub fn write_byte(&mut self, byte: u8) {
|
||||
match byte {
|
||||
b'\n' => self.new_line(),
|
||||
byte => {
|
||||
// wraps automatically
|
||||
if self.column_position >= BUFFER_WIDTH {
|
||||
self.new_line();
|
||||
}
|
||||
|
||||
// bottom row of screen will be written to
|
||||
let row = BUFFER_HEIGHT - 1;
|
||||
let col = self.column_position;
|
||||
|
||||
let color_code = self.color_code;
|
||||
self.buffer.chars[row][col].write(ScreenChar {
|
||||
ascii_character: byte,
|
||||
color_code,
|
||||
});
|
||||
|
||||
// moves on to next byte's position preemptively
|
||||
self.column_position += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// fn write_string :::
|
||||
// &mut self :param: self whose buffer will be written to
|
||||
// s: &str :param: string to write
|
||||
pub fn write_string(&mut self, s: &str) {
|
||||
for byte in s.bytes() {
|
||||
match byte {
|
||||
0x20..=0x7e | b'\n' => self.write_byte(byte),
|
||||
// placeholder for unknown bytes
|
||||
_ => self.write_byte(0xfe),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// fn new_line ::: shifts buffer contents up, replaces cursor on the left
|
||||
// &mut self :param: self whose buffer will be written to
|
||||
fn new_line(&mut self) {
|
||||
for row in 1..BUFFER_HEIGHT {
|
||||
for col in 0..BUFFER_WIDTH {
|
||||
let character = self.buffer.chars[row][col].read();
|
||||
self.buffer.chars[row - 1][col].write(character);
|
||||
}
|
||||
}
|
||||
self.clear_row(BUFFER_HEIGHT - 1);
|
||||
self.column_position = 0;
|
||||
}
|
||||
|
||||
// fn clear_row ::: replaces row with spaces
|
||||
// &mut self :param: self whose buffer will be written to
|
||||
// row: usize :param: row of buffer to clear
|
||||
fn clear_row(&mut self, row: usize) {
|
||||
let blank = ScreenChar {
|
||||
ascii_character: b' ',
|
||||
color_code: self.color_code,
|
||||
};
|
||||
for col in 0..BUFFER_WIDTH {
|
||||
self.buffer.chars[row][col].write(blank);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Write for Writer {
|
||||
// fn write_str :::
|
||||
// &mut self :param: self whose buffer will be written to
|
||||
// s: &str :param: string to be written
|
||||
// : fmt::Result :ret:
|
||||
fn write_str(&mut self, s: &str) -> fmt::Result {
|
||||
self.write_string(s);
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
lazy_static! {
|
||||
// WRITER: Mutex<Writer> :::
|
||||
pub static ref WRITER: Mutex<Writer> = Mutex::new(Writer {
|
||||
column_position: 0,
|
||||
color_code: ColorCode::new(Color::Magenta, Color::Black),
|
||||
buffer: unsafe { &mut *(0xb8000 as *mut Buffer) },
|
||||
});
|
||||
}
|
||||
|
||||
// fn _print ::: used for macro magic
|
||||
// args: fmt::Arguments :param:
|
||||
pub fn _print(args: fmt::Arguments) {
|
||||
use core::fmt::Write;
|
||||
use x86_64::instructions::interrupts;
|
||||
interrupts::without_interrupts(|| {
|
||||
WRITER.lock().write_fmt(args).unwrap();
|
||||
});
|
||||
}
|
||||
18
x86_64-rustboot.json
Normal file
18
x86_64-rustboot.json
Normal file
|
|
@ -0,0 +1,18 @@
|
|||
{
|
||||
"llvm-target": "x86_64-unknown-none",
|
||||
"data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128",
|
||||
"arch": "x86_64",
|
||||
"target-endian": "little",
|
||||
"target-pointer-width": "64",
|
||||
"target-c-int-width": "32",
|
||||
"os": "none",
|
||||
"executables": true,
|
||||
|
||||
"features": "-mmx,-sse,+soft-float",
|
||||
"rustc-abi": "x86-softfloat",
|
||||
|
||||
"disable-redzone": true,
|
||||
"panic-strategy": "abort",
|
||||
|
||||
"linker-flavor": "gcc"
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue