Avoid gcc dependency

2021-12-09 16:25:28 +03:00
parent 345624c745
commit 881e7b2ad3
9 changed files with 113 additions and 75 deletions
--- a/src/syscalls.S
+++ b/src/syscalls.S
@@ -0,0 +1,67 @@
+BITS 32
+
+section .text
+    global _exit
+    global _start_window_draw
+    global _end_window_draw
+    global _define_window
+    global _display_message
+    global _wait_event
+    global _pressed_key
+
+_exit:
+    mov eax, -1
+    int 0x40
+
+_start_window_draw:
+    mov eax, 0xc
+    mov ebx, 1
+    int 0x40
+    ret
+
+_end_window_draw:
+    mov eax, 0xc
+    mov ebx, 2
+    int 0x40
+    ret
+
+_define_window:
+    push edi
+    push ebx
+    xor eax, eax
+    mov ebx, dword [esp + 0x14]
+    mov ecx, dword [esp + 0x18]
+    mov edx, dword [esp + 0x1c]
+    mov edi, dword [esp + 0x20]
+    mov ebx, 2
+    int 0x40
+    pop ebx
+    pop edi
+    ret
+
+_display_message:
+    push edi
+    push esi
+    push ebx
+    mov eax, 4
+    mov ebx, dword [esp + 0x14]
+    mov ecx, dword [esp + 0x18]
+    mov edx, dword [esp + 0x1c]
+    mov esi, dword [esp + 0x20]
+    mov edi, dword [esp + 0x24]
+    mov ebx, 2
+    int 0x40
+    pop ebx
+    pop esi
+    pop edi
+    ret
+
+_wait_event:
+    mov eax, 0xa
+    int 0x40
+    ret
+
+_pressed_key:
+    mov eax, 2
+    int 0x40
+    ret