add missing fault handlers instead of throwing everything into the GP bin, add more ways to crash in native shell

code/shell_native/shell_native.c

@@ -209,7 +209,44 @@ static int runCommand(const char* cmd) {
     if (strcmp(cmd, "exit") == 0) return 1;
     if (strcmp(cmd, "help") == 0) { cmd_help(); return 0; }
     if (strcmp(cmd, "clear") == 0) { SysScreenClear(0); return 0; }
-    if (strcmp(cmd, "crash") == 0) { *(int*)0 = 42; return 0; }
+    if (strncmp(cmd, "crash", 5) == 0) {
+        // Check the sub-option trailing "crash " (offset 6)
+        if (strcmp(cmd + 6, "void") == 0) {
+            // Jumping into the void
+            void (*invalid_func)(void) = NULL;
+            invalid_func();
+            return 0;
+        }
+        else if (strcmp(cmd + 6, "noncanonical") == 0) {
+            // Non-canonical pointer dereference
+            volatile int *ptr = (volatile int*)0x4242424242424242ULL;
+            *ptr = 1337;
+            return 0;
+        }
+        else if (strcmp(cmd + 6, "ud2") == 0) {
+            __ud2();
+            return 0;
+        }
+        else if (strcmp(cmd + 6, "nx") == 0) {
+            // NX / DEP Violation 
+            unsigned char code[] = { 0xC3 }; 
+            void (*execute_stack)(void) = (void (*)(void))code;
+            execute_stack();
+            return 0;
+        }
+        else if (strcmp(cmd + 6, "divzero") == 0) {
+            // Division by zero
+            volatile int zero = 0;
+            volatile int result = 1 / zero;
+            (void)result;
+            return 0;
+        }
+        else {
+            // Default fallback if just "crash" or an unknown sub-option is passed
+            *(volatile int*)0 = 42;
+            return 0;
+        }
+    }
     if (strcmp(cmd, "mem") == 0) { cmd_mem(); return 0; }
     if (strcmp(cmd, "dir") == 0) { cmd_dir("."); return 0; }
     if (strncmp(cmd, "dir ", 4) == 0) { cmd_dir(cmd + 4); return 0; }