everywhere: nuke UM

build/config.zig

@@ -16,7 +16,6 @@ pub const Platform = struct {
 const ArchEnum = enum {
     amd64,
     aarch64,
-    um,
 };
 
 const BootloaderEnum = enum {
@@ -38,9 +37,8 @@ pub fn getPlatform(config: Config) !Platform {
         .arch = switch (config.arch) {
             .amd64 => .x86_64,
             .aarch64 => .aarch64,
-            .um => builtin.cpu.arch,
         },
-        .os = if (config.arch == .um) .linux else .freestanding,
+        .os = .freestanding,
     };
 
     if (ret.os == .freestanding and (ret.arch == .x86_64 or ret.arch == .aarch64)) {

build/run.zig

@@ -47,6 +47,8 @@ pub fn addRun(b: *std.Build, kernel: *std.Build.Step.Compile, plat: config.Platf
             qemu.addArgs(&.{
                 "-d",
                 "int",
+                "-s",
+                "-S",
                 "-D",
                 "qemu.log",
                 "-no-reboot",
@@ -56,7 +58,7 @@ pub fn addRun(b: *std.Build, kernel: *std.Build.Step.Compile, plat: config.Platf
 
         switch (plat.arch) {
             .x86_64 => {
-                qemu.addArgs(&.{ "-serial", "stdio", "-m", "1G", "-smp", "4" });
+                qemu.addArgs(&.{ "-serial", "stdio", "-m", "32M", "-smp", "4" });
 
                 if (!debug and builtin.target.os.tag == .linux and builtin.cpu.arch == .x86_64) qemu.addArgs(&.{ "-enable-kvm", "-cpu", "host,+invtsc" });
             },
@@ -66,7 +68,5 @@ pub fn addRun(b: *std.Build, kernel: *std.Build.Step.Compile, plat: config.Platf
         }
 
         run_step.dependOn(&qemu.step);
-    } else {
-        run_step.dependOn(&b.addRunArtifact(kernel).step);
     }
 }