commit 650c79ed1d1a5f16ff3ad46e4a32c1a75d608124
from: Murilo Ijanc <murilo.ijanc@kovi.com.br>
date: Tue Jan 27 23:33:19 2026 UTC

add serial and vga text output, print ALIVE on boot

commit - c40788ab652e5648301786507982a694873230ff
commit + 650c79ed1d1a5f16ff3ad46e4a32c1a75d608124
blob - 5f4ec049e82ced20821de85894efe224255e3790
blob + 1825aaae6f72bcd7762657fa9c98ad36c8adfb53
--- .cargo/config.toml
+++ .cargo/config.toml
@@ -1,2 +1,5 @@
 [build]
 target = ["x86_64-unknown-none"]
+
+[target.x86_64-unknown-none]
+rustflags = ["-C", "relocation-model=static"]
blob - ea8c4bf7f35f6f77f75d92ad8ce8349f6e81ddba
blob + f90dc2df8c995332109a36872b9e98cb433a197f
--- .gitignore
+++ .gitignore
@@ -1 +1,4 @@
 /target
+/limine
+/iso_root
+*.iso
blob - 76ef8853b9a6018a258a4674fd89a4c487ce98e7
blob + 21ac2ff11eee9b58a875b5347ecf8dd1d0a14a22
--- Makefile
+++ Makefile
@@ -1,19 +1,48 @@
-.PHONY: all check build build-release test fmt clippy lint doc clean install run
+.PHONY: all build build-release run clean fmt clippy lint iso
 
+KERNEL  := target/x86_64-unknown-none/debug/omk
+ISO     := omk.iso
+ISO_DIR := iso_root
+
 all: run
 
-check:
-	cargo check
-
 build:
 	cargo build
 
 build-release:
-	cargo build
+	cargo build --release
 
-test:
-	cargo test
+limine:
+	git clone https://github.com/limine-bootloader/limine.git \
+		--branch=v8.x-binary --depth=1
+	$(MAKE) -C limine
 
+iso: build limine
+	rm -rf $(ISO_DIR)
+	mkdir -p $(ISO_DIR)/boot/limine $(ISO_DIR)/EFI/BOOT
+	cp $(KERNEL) $(ISO_DIR)/boot/kernel.elf
+	cp limine.conf $(ISO_DIR)/boot/limine/
+	cp limine/limine-bios.sys $(ISO_DIR)/boot/limine/
+	cp limine/limine-bios-cd.bin $(ISO_DIR)/boot/limine/
+	cp limine/limine-uefi-cd.bin $(ISO_DIR)/boot/limine/
+	cp limine/BOOTX64.EFI $(ISO_DIR)/EFI/BOOT/
+	cp limine/BOOTIA32.EFI $(ISO_DIR)/EFI/BOOT/
+	xorriso -as mkisofs -R \
+		-b boot/limine/limine-bios-cd.bin \
+		-no-emul-boot -boot-load-size 4 -boot-info-table \
+		--efi-boot boot/limine/limine-uefi-cd.bin \
+		-efi-boot-part --efi-boot-image --no-emul-boot \
+		--protective-msdos-label \
+		$(ISO_DIR) -o $(ISO)
+	./limine/limine bios-install $(ISO)
+
+run: iso
+	qemu-system-x86_64 \
+		-cdrom $(ISO) \
+		-serial stdio \
+		-no-reboot \
+		-no-shutdown
+
 fmt:
 	cargo fmt
 
@@ -24,14 +53,6 @@ lint:
 	cargo fmt --check
 	cargo clippy --all-features -- -D warnings
 
-doc:
-	cargo doc
-
 clean:
 	cargo clean
-
-install:
-	cargo install --path .
-
-run:
-	cargo run
+	rm -rf $(ISO_DIR) $(ISO)
blob - 1de38b2ec75bb3384096a12bc235782494d890f0
blob + 6399dd32f11fba63858dfb26ff9c73cbc3e9ae36
--- build.rs
+++ build.rs
@@ -17,6 +17,8 @@
 
 fn main() {
     let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
+    println!("cargo:rustc-link-arg=--no-dynamic-linker");
+    println!("cargo:rustc-link-arg=-static");
     println!("cargo:rustc-link-arg=-Tlinker-{arch}.ld");
     println!("cargo:rerun-if-changed=linker-{arch}.ld");
 }
blob - /dev/null
blob + 3d1b299785984668ffa781ce54b781c5411277e0 (mode 644)
--- /dev/null
+++ limine.conf
@@ -0,0 +1,6 @@
+timeout: 0
+serial: yes
+
+/Olivia MicroKernel (OMK)
+    protocol: limine
+    path: boot():/boot/kernel.elf
blob - 79fda87a4d008e173cc879d522d7a9ce45cda1a1
blob + fb74be1776407495f4175388b8c3302e8a839e4e
--- src/main.rs
+++ src/main.rs
@@ -18,6 +18,8 @@
 #![no_std]
 #![no_main]
 
+use core::arch::asm;
+
 use limine::{BaseRevision, RequestsStartMarker, RequestsEndMarker};
 
 #[used]
@@ -30,6 +32,12 @@ pub static BASE_REVISION: BaseRevision = BaseRevision:
 
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn kmain() -> ! {
+    serial_init();
+    serial_print("OMK: Olivia MicroKernel\n");
+    serial_print("ALIVE\n");
+
+    vga_write("ALIVE", 0x0F);
+
     loop {}
 }
 
@@ -38,6 +46,61 @@ fn panic(_info: &core::panic::PanicInfo) -> ! {
     loop {}
 }
 
+const COM1: u16 = 0x3F8;
+
+unsafe fn outb(port: u16, val: u8) {
+    unsafe {
+        asm!("out dx, al", in("dx") port, in("al") val);
+    }
+}
+
+unsafe fn inb(port: u16) -> u8 {
+    let val: u8;
+    unsafe {
+        asm!("in al, dx", out("al") val, in("dx") port);
+    }
+    val
+}
+
+fn serial_init() {
+    unsafe {
+        outb(COM1 + 1, 0x00);
+        outb(COM1 + 3, 0x80);
+        outb(COM1 + 0, 0x03);
+        outb(COM1 + 1, 0x00);
+        outb(COM1 + 3, 0x03);
+        outb(COM1 + 2, 0xC7);
+        outb(COM1 + 4, 0x0B);
+    }
+}
+
+fn serial_putc(c: u8) {
+    while unsafe { inb(COM1 + 5) } & 0x20 == 0 {}
+    unsafe {
+        outb(COM1, c);
+    }
+}
+
+fn serial_print(s: &str) {
+    for b in s.bytes() {
+        if b == b'\n' {
+            serial_putc(b'\r');
+        }
+        serial_putc(b);
+    }
+}
+
+fn vga_write(s: &str, color: u8) {
+    let vga = 0xb8000 as *mut u16;
+    for (i, b) in s.bytes().enumerate() {
+        unsafe {
+            vga.add(i).write_volatile(
+                (color as u16) << 8 | b as u16
+            );
+        }
+    }
+}
+
 #[used]
 #[unsafe(link_section = ".requests_end")]
 pub static REQUEST_END: RequestsEndMarker = RequestsEndMarker::new();