diff options
| -rw-r--r-- | build.zig | 2 | ||||
| -rw-r--r-- | src/main.zig | 23 |
2 files changed, 22 insertions, 3 deletions
@@ -60,7 +60,7 @@ pub fn build(b: *Build) !void { iso_step.dependOn(&iso_cmd.step); b.default_step.dependOn(iso_step); - const run_cmd_str = &[_][]const u8{ "qemu-system-x86_64", "-cdrom", iso_path, "-debugcon", "stdio", "-vga", "virtio", "-m", "4G", "-machine", "q35,accel=kvm:whpx:tcg", "-no-reboot", "-no-shutdown" }; + const run_cmd_str = &[_][]const u8{ "qemu-system-x86_64", "-cdrom", iso_path, "-debugcon", "stdio", "-vga", "virtio", "-m", "4G", "-machine", "q35,accel=kvm:tcg", "-no-reboot", "-no-shutdown" }; const run_cmd = b.addSystemCommand(run_cmd_str); run_cmd.step.dependOn(b.getInstallStep()); diff --git a/src/main.zig b/src/main.zig index dedcb65..f716a84 100644 --- a/src/main.zig +++ b/src/main.zig @@ -20,8 +20,27 @@ export const multiboot align(4) linksection(".multiboot") = MultibootHeader{ export var stack: [16 * 1024]u8 align(16) linksection(".bss") = undefined; const stack_bytes_slice = stack[0..]; -export fn _start() callconv(.Naked) noreturn { - // @call(.{ .stack = stack_bytes_slice }, kmain, .{}); +inline fn inb(port: u16) u8 { + return asm volatile ("inb %[port], %[result]" + : [result] "={al}" (-> u8), + : [port] "N{dx}" (port), + ); +} + +inline fn outb(port: u16, data: u8) void { + asm volatile ("outb %[data], %[port]" + : + : [data] "{al}" (data), + [port] "N{dx}" (port), + ); +} + +export fn _start() callconv(.C) noreturn { + outb(0xe9, 'H'); + outb(0xe9, 'i'); + outb(0xe9, '!'); + outb(0xe9, '\n'); + asm volatile ( \\ mov %[stk], %rsp \\ mov %rsp, %rbp |