feat: add support for console sessions to crashpad and crash handling in kernel

programs/src/crashpad/main.cpp

@@ -1,6 +1,6 @@
 /*
     * main.cpp
-    * MontaukOS Crashpad — displays crash reports in a popup window
+    * MontaukOS Crashpad - renders process crash information 
     * Copyright (c) 2026 Daniel Hammer
 */
 
@@ -13,6 +13,20 @@
 
 using namespace gui;
 
+static bool is_desktop_running() {
+    static montauk::abi::ProcInfo procs[256];
+    int count = montauk::proclist(procs, 256);
+    if (count <= 0) return false;
+
+    int self_pid = montauk::getpid();
+    for (int i = 0; i < count; i++) {
+        if (montauk::streq(procs[i].name, "0:/os/desktop.elf")) {
+            return true;
+        }
+    }
+    return false;
+}
+
 static constexpr int WINDOW_W = 460;
 static constexpr int WINDOW_H = 480;
 static constexpr int PADDING   = 12;
@@ -201,6 +215,42 @@ static void render() {
     g_win.present();
 }
 
+// ==== Console (no-desktop) crash report ====
+// When no desktop is running, the crashpad is spawned with its stdout
+// redirected to the same out-stream as the crashed process (wired up by the
+// kernel in SpawnCrashPad), so montauk::print() lands in the console terminal.
+static void emit(const char* s) { montauk::print(s); }
+
+static void emit_kv_hex(const char* key, uint64_t val) {
+    char buf[32];
+    emit("  ");
+    emit(key);
+    emit(": ");
+    format_hex16(buf, val);
+    emit(buf);
+    emit("\n");
+}
+
+static void render_console() {
+    char num[16];
+    emit("\n\033[1;31m*** Process crashed ***\033[0m\n");
+    emit("Process: ");
+    emit(g_report.processName);
+    emit(" (pid ");
+    format_decimal(num, g_report.pid);
+    emit(num);
+    emit(")\n");
+    emit("Exception: ");
+    emit(g_report.exceptionName);
+    emit("\n");
+    emit_kv_hex("RIP", g_report.instructionPointer);
+    emit_kv_hex("RSP", g_report.stackPointer);
+    emit_kv_hex("RFLAGS", g_report.flags);
+    if (g_report.exceptionVector == 0x0E)
+        emit_kv_hex("CR2 (fault addr)", g_report.faultingAddress);
+    emit("\n");
+}
+
 extern "C" void _start() {
     fonts::init();
 
@@ -208,42 +258,48 @@ extern "C" void _start() {
     int available = montauk::crash_report(&g_report);
     if (available <= 0) montauk::exit(1);
 
-    if (!g_win.create("Process Crashed", WINDOW_W, WINDOW_H)) montauk::exit(1);
+    if (is_desktop_running()) {
+        if (!g_win.create("Process Crashed", WINDOW_W, WINDOW_H)) montauk::exit(1);
 
-    render();
+        render();
 
-    while (true) {
-        montauk::abi::WinEvent ev;
-        int r = g_win.poll(&ev);
-        if (r < 0) break;
-        if (r == 0) {
-            montauk::sleep_ms(16);
-            continue;
-        }
-
-        if (ev.type == 3) break; // close
-
-        if (ev.type == 0 && ev.key.pressed) {
-            if (ev.key.scancode == 0x01) break; // Escape
-            if (ev.key.scancode == 0x51) {
-                // Page Down: scroll down
-                g_scroll += 60;
-                render();
+        while (true) {
+            montauk::abi::WinEvent ev;
+            int r = g_win.poll(&ev);
+            if (r < 0) break;
+            if (r == 0) {
+                montauk::sleep_ms(16);
+                continue;
             }
-            if (ev.key.scancode == 0x49) {
-                // Page Up: scroll up
-                g_scroll -= 60;
-                if (g_scroll < 0) g_scroll = 0;
+
+            if (ev.type == 3) break; // close
+
+            if (ev.type == 0 && ev.key.pressed) {
+                if (ev.key.scancode == 0x01) break; // Escape
+                if (ev.key.scancode == 0x51) {
+                    // Page Down: scroll down
+                    g_scroll += 60;
+                    render();
+                }
+                if (ev.key.scancode == 0x49) {
+                    // Page Up: scroll up
+                    g_scroll -= 60;
+                    if (g_scroll < 0) g_scroll = 0;
+                    render();
+                }
+            }
+
+            if (ev.type == 2) {
+                // Resize
                 render();
             }
         }
 
-        if (ev.type == 2) {
-            // Resize
-            render();
-        }
+        g_win.destroy();
+    } else {
+        // No desktop: print a textual report to the redirected console.
+        render_console();
     }
 
-    g_win.destroy();
     montauk::exit(0);
 }