v0.5.5: on-screen boot markers for disk/fs stage

Real hardware has no serial console, and the ahci/fat/fs boot
diagnostics were serial-only — a silent fs failure left the user with
no way to see where boot stopped.  Add boot_marker lines for the AHCI
disk count, FAT volume count, and the VFS tree + fs self-test result.

2 files changed, 18 insertions, 3 deletions

diff --git a/rsdos/src/main.rs b/rsdos/src/main.rs
index 4521a42..4fe89c9 100644
--- a/rsdos/src/main.rs
+++ b/rsdos/src/main.rs
@@ -298,15 +298,30 @@ pub unsafe extern "efiapi" fn efi_main(image_handle: Handle, system_table: *mut
     if !rsnix::ahci::init() {
         rsnix::serial_println!("ahci: no disk attached");
     }
+    rsnix::gop::boot_marker(&alloc::format!(
+        "rsnix: ahci {} disk(s)",
+        rsnix::ahci::disk_count()
+    ));
     rsnix::fat::init(); // prints one line per mounted volume
+    rsnix::gop::boot_marker(&alloc::format!(
+        "rsnix: fat {} volume(s) mounted",
+        rsnix::fat::volume_count()
+    ));
 
     let (dirs, files) = rsnix::fs::init();
     rsnix::serial_println!("fs: vfs ready — {} dirs, {} files", dirs, files);
-    if rsnix::fs::self_test() {
+    let fstest = rsnix::fs::self_test();
+    if fstest {
         rsnix::serial_println!("fs: self-test OK (create/read/write/remove)");
     } else {
         rsnix::serial_println!("fs: self-test FAILED");
     }
+    rsnix::gop::boot_marker(&alloc::format!(
+        "rsnix: fs ok {} dirs/{} files self-test {}",
+        dirs,
+        files,
+        if fstest { "ok" } else { "FAILED" }
+    ));
 
     rsnix::serial_println!("boot: entering shell");
     rsnix::gop::boot_marker("rsnix: boot done — shell");
diff --git a/scripts/test-fault.sh b/scripts/test-fault.sh
index 59f741f..74d83eb 100755
--- a/scripts/test-fault.sh
+++ b/scripts/test-fault.sh
@@ -93,8 +93,8 @@ grep -aq "!!! halting" "$LOG" || fail "no halt message"
 echo "==> 6/6 crash.log persisted on the CRASHLOG stick"
 grep -aq "crashlog: vol .* (CRASHLOG)" "$LOG" || fail "crashlog did not target the CRASHLOG stick"
 grep -aq "crashlog: wrote" "$LOG" || fail "crashlog write did not complete"
-mdir -i "$CRASH_IMG" "::" 2>/dev/null | grep -aqi "crash" \
-        || fail "crash.log missing on the CRASHLOG stick"
+mdir -i "$CRASH_IMG" "::" 2>/dev/null | grep -aqi "crash" ||
+        fail "crash.log missing on the CRASHLOG stick"
 # The boot ESP must NOT receive the crash log.
 if [ -f "$ESP_DIR/crash.log" ]; then
         fail "crash.log landed on the boot ESP instead of the CRASHLOG stick"