stdlib/syscall.asm


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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

draw_framebuffer:
  mov rax, 2
  syscall
  ret