Initial commit

build.zig

@@ -0,0 +1,42 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) !void {
+    var disabled_features = std.Target.Cpu.Feature.Set.empty;
+    var enabled_features = std.Target.Cpu.Feature.Set.empty;
+
+    disabled_features.addFeature(@intFromEnum(std.Target.x86.Feature.mmx));
+    disabled_features.addFeature(@intFromEnum(std.Target.x86.Feature.sse));
+    disabled_features.addFeature(@intFromEnum(std.Target.x86.Feature.sse2));
+    disabled_features.addFeature(@intFromEnum(std.Target.x86.Feature.avx));
+    disabled_features.addFeature(@intFromEnum(std.Target.x86.Feature.avx2));
+
+    enabled_features.addFeature(@intFromEnum(std.Target.x86.Feature.soft_float));
+
+    const target = b.resolveTargetQuery(.{
+        .cpu_arch = std.Target.Cpu.Arch.x86,
+        .abi = std.Target.Abi.none,
+        .os_tag = std.Target.Os.Tag.freestanding,
+        .cpu_features_sub = disabled_features,
+        .cpu_features_add = enabled_features,
+    });
+
+    const kernel = b.addExecutable(.{
+        .name = "kernel.elf",
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = .ReleaseFast,
+        .code_model = .kernel,
+    });
+    kernel.setLinkerScript(b.path("kernel.ld"));
+
+    b.installArtifact(kernel);
+
+    const qemu = b.addSystemCommand(&[_][]const u8{
+        "qemu-system-x86_64",
+    });
+    qemu.addArg("-kernel");
+    qemu.addFileArg(kernel.getEmittedBin());
+
+    const run = b.step("run", "Run QEMU");
+    run.dependOn(&qemu.step);
+}