From b9db05978f6c7d5f3df98c661caba534c9e59c59 Mon Sep 17 00:00:00 2001
From: Julien CLEMENT <julien.clement@epita.fr>
Date: Thu, 2 Dec 2021 08:56:10 +0100
Subject: [PATCH] BREAKING: bootloader refacto and loading star

Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
---
 Makefile                     |  2 +-
 src/{ => boot}/boot.asm      |  0
 src/{ => boot}/multiboot.asm |  0
 src/lib.rs                   | 16 +++++++++++++++-
 4 files changed, 16 insertions(+), 2 deletions(-)
 rename src/{ => boot}/boot.asm (100%)
 rename src/{ => boot}/multiboot.asm (100%)

diff --git a/Makefile b/Makefile
index 80f7cab..337f6f3 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ INSTALL_ROOT = iso
 ABS_INSTALL = $(abspath $(INSTALL_ROOT))
 
 LINKER_SCRIPT = src/linker.ld
-BOOT_OBJS = src/multiboot.o src/boot.o
+BOOT_OBJS = src/boot/multiboot.o src/boot/boot.o
 LIB_JULIOS = target/x86_64-julios/debug/libjulios.a
 
 GRUB_CFG = grub/grub.cfg
diff --git a/src/boot.asm b/src/boot/boot.asm
similarity index 100%
rename from src/boot.asm
rename to src/boot/boot.asm
diff --git a/src/multiboot.asm b/src/boot/multiboot.asm
similarity index 100%
rename from src/multiboot.asm
rename to src/boot/multiboot.asm
diff --git a/src/lib.rs b/src/lib.rs
index 4a4742d..2eb77d1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,11 +9,14 @@ fn panic(_info: &core::panic::PanicInfo) -> !
 
 static HELLO: &[u8] = b"Welcome to the JuliOS";
 
+static STAR: &[u8] = b"|/-\\";
+
 #[no_mangle]
 pub extern "C" fn julios_main() -> !
 {
     let vga_buffer: *mut u8 = 0xb8000 as *mut u8;
 
+    let mut k: usize = 0;
     for (i, &byte) in HELLO.iter().enumerate()
     {
         unsafe
@@ -21,7 +24,18 @@ pub extern "C" fn julios_main() -> !
             *vga_buffer.offset(i as isize * 2) = byte;
             *vga_buffer.offset(i as isize * 2 + 1) = 0xb;
         }
+        k = i * 2 + 2;
     }
 
-    loop {}
+    let mut j: usize = 0;
+    loop
+    {
+        unsafe
+        {
+            *vga_buffer.offset(k as isize) = STAR[j];
+            *vga_buffer.offset(k as isize + 1) = 0xb;
+            j += 1;
+            j %= 4;
+        }
+    }
 }