wip

.gitignore

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+zig-cache
+zig-out

Makefile

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+ifndef CPUS
+CPUS := 3
+endif
+
+qemu:
+	qemu-system-aarch64 \
+		-machine virt \
+		-kernel zig-out/bin/kernel \
+		-m 128M \
+		-smp $(CPUS) \
+		-nographic

build.zig

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+const std = @import("std");
+const Builder = @import("std").build.Builder;
+const LazyPath = @import("std").build.LazyPath;
+const Target = @import("std").Target;
+const CrossTarget = @import("std").zig.CrossTarget;
+const Feature = @import("std").Target.Cpu.Feature;
+
+pub fn build(b: *Builder) void {
+    const arch = Target.Cpu.Arch.aarch64;
+    const tag = Target.Os.Tag.freestanding;
+    const target = CrossTarget.fromTarget(.{
+        .cpu = .{
+            .arch = arch,
+            .model = Target.Cpu.Model.generic(arch),
+            .features = Feature.Set.empty,
+        },
+        .os = .{ .tag = tag, .version_range = Target.Os.VersionRange.default(tag, arch) },
+        .ofmt = Target.ObjectFormat.raw,
+        .abi = Target.Abi.none,
+    });
+
+    const result = b.addExecutable(.{
+        .name = "kernel.elf",
+        .root_source_file = .{ .path = "src/entry.zig" },
+        .target = target,
+    });
+    result.setLinkerScript(.{ .path = "src/kernel.ld" });
+    b.installArtifact(result);
+}

src/entry.zig

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+export fn _entry() noreturn {
+    while (true) {}
+}

src/kernel.ld

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+ENTRY(_entry)
+
+SECTIONS
+{
+}

src/main.zig

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+pub fn main() noreturn {}