stdlib/syscall.asm


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

bits 64

global encode_color
global get_framebuffer
global draw_framebuffer

section .text

encode_color:
  mov rax, 0
  syscall
  ret

get_framebuffer:
  push rcx
  push rdx
  push rsi
  push rdi
  mov rax, 1
  syscall
  pop rcx
  mov qword [rcx], rax
  pop rcx
  mov dword [rcx], edi
  shr rdi, 32
  pop rcx
  mov dword [rcx], edi
  pop rcx
  mov dword [rcx], esi
  ret