ptos/amd64+ke: Add bugcheck support

Signed-off-by: Chloe M <chloe@mensia.org>
2026-07-11 00:21:45 -04:00
parent 686f8daf8b
commit 9c91a4d8e3
3 changed files with 141 additions and 0 deletions
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Bugcheck handler
+ * Author:      Chloe M.
+ */
+
+#include <ex/trace.h>
+#include <ke/bugcheck.h>
+#include <drivers/bootvid/fbio.h>
+#include <ptdef.h>
+
+/* Used to safely obtain bugcheck reason */
+#define BUGCHECK_REASON(REASON)         \
+    ((REASON) >= NELEM(ReasonTable))    \
+        ? "bad"                         \
+        : ReasonTable[(REASON)]
+
+/* Prints the bugcheck banner */
+#define BUGCHECK_BANNER()                                                    \
+    TRACE(                                                                   \
+        "\033[31;40m! ***** \033[37;40mBUGCHECK \033[31;40m***** !\033[0m\n" \
+    );
+
+/* Globals to reduce stack usage */
+static va_list Ap;
+static CHAR BugCheckBuf[256];
+static CHAR BugCheckMsg[] =
+    "Something went wrong during system operation and the machine has\n"
+    "been halted to prevent data loss.\n\n";
+
+/* Table of reason strings */
+static CHAR *ReasonTable[] = {
+    [BUGCHECK_MISC] = "misc reason",
+    [BUGCHECK_OOM]  = "out of memory",
+    [BUGCHECK_IO_ERROR] = "i/o error",
+    [BUGCHECK_UNBOUND_RESRC] = "unbounded resource",
+    [BUGCHECK_EXCEPTION] = "fatal exception"
+};
+
+VOID
+KiBugCheck(BUGCHECK_REASON Reason, const CHAR *Fmt, ...)
+{
+    /* Enable the console if we don't have one */
+    if (!BootVidConsEn()) {
+        BootVidInitCons(NULL);
+    }
+
+    va_start(Ap, Fmt);
+    VFmtPrintf(BugCheckBuf, sizeof(BugCheckBuf), Fmt, Ap);
+
+    BUGCHECK_BANNER();
+    TRACE("\033[37;40m");
+    TRACE(BugCheckMsg);
+    TRACE("\033[31;40mbugcheck: \033[37;40m%s", BugCheckBuf);
+    TRACE("\033[31;40mreason: \033[37;40m%s\n", BUGCHECK_REASON(Reason));
+    TRACE("\033[37;40m");
+}