import Zig Bare Bones project

ref: https://wiki.osdev.org/Zig_Bare_Bones

1 files changed, 31 insertions, 0 deletions

diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..298e2c2
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,31 @@
+const console = @import("console.zig");
+ 
+const ALIGN = 1 << 0;
+const MEMINFO = 1 << 1;
+const MAGIC = 0x1BADB002;
+const FLAGS = ALIGN | MEMINFO;
+ 
+const MultibootHeader = packed struct {
+    magic: i32 = MAGIC,
+    flags: i32,
+    checksum: i32,
+};
+ 
+export var multiboot align(4) linksection(".multiboot") = MultibootHeader{
+    .flags = FLAGS,
+    .checksum = -(MAGIC + FLAGS),
+};
+ 
+export var stack_bytes: [16 * 1024]u8 align(16) linksection(".bss") = undefined;
+const stack_bytes_slice = stack_bytes[0..];
+ 
+export fn _start() callconv(.Naked) noreturn {
+    @call(.{ .stack = stack_bytes_slice }, kmain, .{});
+ 
+    while (true) {}
+}
+ 
+fn kmain() void {
+    console.initialize();
+    console.puts("Hello world!");
+}