From 537b6c834b541b1f8f15f2ad31dcdc7f9d9a71a5 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Sat, 13 Jul 2024 21:31:54 -0700
Subject: Basic Allocator

---
 alloc.inc | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 alloc.inc

(limited to 'alloc.inc')

diff --git a/alloc.inc b/alloc.inc
new file mode 100644
index 0000000..da27e1e
--- /dev/null
+++ b/alloc.inc
@@ -0,0 +1,25 @@
+%ifndef ALLOC_INC
+%define ALLOC_INC
+%ifndef SYS_INC
+%include "sys.inc"
+%endif
+
+%macro	alloc	1
+	mov	rax,	SYS_MMAP
+	xor	rdi,	rdi	; Let Kernel give Address
+	mov	rsi,	%1	; Size to allocate
+	mov	rdx,	3	; PROT_READ | PROT_WRITE
+	mov	r10,	0x1002	; MAP_PRIVATE | MAP_ANONYMOUS
+	xor	r8,	r8	; fd = -1, Not backed by a file
+	xor	r9,	r9	; offset = 0
+	syscall
+%endm
+
+%macro	free	2
+	mov	rax,	SYS_MUNMAP
+	mov	rdi,	%1	; Address to free
+	mov	rsi,	%2	; Size allocated
+	syscall
+%endm
+
+%endif
-- 
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