Basic Allocator

1 files changed, 25 insertions, 0 deletions

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