stos: Add kernel knotting impl

Signed-off-by: Chloe M. <chloe@mensia.org>
2026-06-23 05:36:10 +00:00
parent d2596979a2
commit 81d5f13a30
4 changed files with 136 additions and 1 deletions
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description:  Fucks and knots the kernel
+ * Author:       Chloe M.
+ */
+
+    .text
+    .globl KeKnot
+KeKnot:
+    /*
+     * When we are called here, the kernel is to be fucked with
+     * the most love and care we can put out before we knot it
+     * and fill it with warm cum...
+     */
+
+    cli    /* Don't get interrupted */
+    cld    /* Just in case */
+
+    /*
+     * We don't want another processor to attempt to fuck the kernel
+     * while we are already knotting it to avoid it becoming too
+     * cumdrunk and misbehaving further. If another processor attempts
+     * to do so, knot and lock them hard, because that's what needy
+     * cores get :3
+     */
+    mov $1, %rax            /* Prepare the lock */
+    xchg %rax, MpLock       /* Ah!~ Fuck~ @.@ */
+    or %rax, %rax           /* Are we another core? */
+    jnz 1f
+
+    /*
+     * The kernel is being extra needy and may or may not have
+     * kicked its paws into its stack. It's okay little kernel,
+     * we'll give you a new stack that's safe and cozy to lay in
+     * before the knotting begins!
+     */
+    lea KnotStackTop(%rip), %rsp
+
+    call KiKnot             /* Enter the main knot handler */
+1:  mfence                  /* Drain those caches~ */
+.Lock:
+    cli                     /* Don't get interrupted */
+    hlt                     /* Get knotted >:3 */
+    jmp .Lock
+
+    .section .data
+MpLock: .quad 0
+KnotStack: .fill 4096, 1, 0
+KnotStackTop: