From abe7d1c5f4ecbfa05dc41b3a7d603086a9f4f4da Mon Sep 17 00:00:00 2001
From: Ain <41307858+nero@users.noreply.github.com>
Date: Sat, 31 Aug 2019 12:00:33 +0000
Subject: [PATCH] Add free_sector

---
 kernel/malloc.asm | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/kernel/malloc.asm b/kernel/malloc.asm
index df634cf..f451c1c 100644
--- a/kernel/malloc.asm
+++ b/kernel/malloc.asm
@@ -128,6 +128,7 @@ free:
   ret
 
 ; Allocate a sector, 512 bytes or 32 paragraphs
+; OUT BX ptr to sector
 malloc_sector:
   call malloc_get_table
   mov cx, 0x0200
@@ -152,6 +153,16 @@ malloc_sector:
   xchg bx, di
   ret
 
+; Free a sector
+; IN BX ptr to sector
+free_sector:
+  call malloc_calc_offsets
+  xor ax, ax
+  add di, bx
+  stosw
+  stosw
+  ret
+
 fatal_oom:
   call printf
   db "PANIC OOM", 0x0A, 0x0D, 0x00