initial commit

2026-10-31 07:18:22 +00:00 · 2026-03-21 22:46:54 -04:00
parent cf7df37498
commit 9e065ee023
45 changed files with 4430 additions and 0 deletions
@@ -0,0 +1,69 @@
+const std = @import("std");
+const config = @import("config.zig");
+const image = @import("image.zig");
+
+const QemuArgs = struct {
+    suffix: []u8,
+    args: [][]u8,
+};
+
+pub fn addRun(b: *std.Build, kernel: *std.Build.Step.Compile, plat: config.Platform) void {
+    const run_step = b.step("run", "Run the kernel");
+    const uefi = b.option(bool, "uefi", "Boot with UEFI firmware") orelse false;
+    const debug = b.option(bool, "debug", "Boot in debug mode") orelse false;
+    const extra_qemu_args = b.option([]const []const u8, "qemu-args", "Extra arguments to pass to QEMU") orelse &.{};
+
+    if (plat.os == .freestanding) {
+        const limine = b.dependency("limine", .{});
+        const ovmf = b.dependency("ovmf", .{});
+        const iso_out = image.addIso(b, plat.arch, "myos", kernel, limine);
+
+        const qemu_bin = switch (plat.arch) {
+            .x86_64 => "qemu-system-x86_64",
+            .aarch64 => "qemu-system-aarch64",
+            .riscv64 => "qemu-system-riscv64",
+            else => "qemu-system-x86_64",
+        };
+        const ovmf_fd = switch (plat.arch) {
+            .x86_64 => "ovmf-code-x86_64.fd",
+            .aarch64 => "ovmf-code-aarch64.fd",
+            .riscv64 => "ovmf-code-riscv64.fd",
+            else => "ovmf-code-x86_64.fd",
+        };
+
+        const qemu = b.addSystemCommand(&.{qemu_bin});
+
+        if (plat.arch != .x86_64 or uefi) {
+            qemu.addArg("-drive");
+            qemu.addPrefixedFileArg("if=pflash,format=raw,readonly=on,file=", ovmf.path(ovmf_fd));
+        }
+
+        qemu.addArgs(extra_qemu_args);
+        qemu.addArg("-cdrom");
+        qemu.addFileArg(iso_out.path);
+
+        if (debug) {
+            qemu.addArgs(&.{
+                "-serial",    "stdio",
+                "-d",         "int",
+                "-D",         "qemu.log",
+                "-no-reboot", "-no-shutdown",
+            });
+        }
+
+        switch (plat.arch) {
+            .x86_64 => {
+                qemu.addArgs(&.{ "-debugcon", "stdio" });
+
+                if (!debug) qemu.addArgs(&.{ "-enable-kvm", "-cpu", "host" });
+            },
+            .aarch64 => qemu.addArgs(&.{ "-machine", "virt", "-cpu", "cortex-a57" }),
+            .riscv64 => qemu.addArgs(&.{ "-machine", "virt" }),
+            else => {},
+        }
+
+        run_step.dependOn(&qemu.step);
+    } else {
+        run_step.dependOn(&b.addRunArtifact(kernel).step);
+    }
+}