initial commit

.gitignore

@@ -0,0 +1 @@
+build

Makefile

@@ -0,0 +1,31 @@
+NASM = nasm
+LD = ld
+
+NASM_FLAGS := -felf64
+LD_FLAGS := --strip-all 
+
+SRC_PATH := src
+OBJ_PATH := build/obj
+BIN_PATH := build/bin
+
+SRC_FILES := $(wildcard $(SRC_PATH)/*.asm)
+OBJ_FILES := $(patsubst $(SRC_PATH)/%.asm,$(OBJ_PATH)/%.o,$(SRC_FILES))
+
+all: make-build-dir $(BIN_PATH)/asm-game-of-life
+
+make-build-dir:
+	mkdir -p $(OBJ_PATH)
+	mkdir -p $(BIN_PATH)
+
+
+$(BIN_PATH)/asm-game-of-life: $(OBJ_FILES)
+	$(LD) $(LD_FLAGS) $^ -o $@
+
+
+$(OBJ_PATH)/%.o: $(SRC_PATH)/%.asm
+	$(NASM) $(NASM_FLAGS) $< -o $@
+
+clean:
+	rm -fr build
+
+

src/main.asm

@@ -0,0 +1,115 @@
+SYS_WRITE   equ 1
+SYS_BRK     equ 12
+SYS_EXIT    equ 60
+
+STDOUT      equ 1
+
+ESC_CHAR    equ 27
+ASCII_ZERO  equ 48
+
+section .bss
+  heap_ptr resp 1
+
+section .data
+  hello: db ESC_CHAR, "[10;15Hhello suckers! :)", 10, 0
+  test:  db ESC_CHAR, "[20;25Hmore txt here", 10, 0
+  clear: db ESC_CHAR, "[2J", 0
+
+section .text
+  global _start
+  
+  unsigned_int_to_acii: ; takes value stored in rdi
+    push rdx
+    push r12
+    push r13
+    
+    mov r12, rdi
+
+    mov rax,SYS_BRK
+    mov rdi,0
+    syscall
+    mov [heap_ptr], rax
+    
+    mov r13, 0
+    mov rax, r12
+    mov rcx, 10
+    .count_loop:
+      inc r13
+      cmp rax, 10
+      jl .loop_exit
+
+      xor rdx, rdx
+      div rcx
+      push rdx
+      jmp .count_loop
+
+    .loop_count_exit:
+    push rax
+      
+    mov rdi, [heap_ptr]
+    add rdi, r13
+    inc rdi
+    mov rax, SYS_BRK
+    syscall
+    
+    mov rdi [heap_ptr]
+    mov rcx 0
+    .store_loop: ; basicly for loop
+      cmp rcx, rdi
+      jnl .loop_store_exit
+
+      pop rax
+      add rax, ASCII_ZERO
+      
+      mov rdx rdi
+      add rdx rcx
+      mov byte rdx, rax
+      
+      inc rcx
+      jmp .store_loop
+
+    .loop_store_exit
+    add rdi rcx
+    mov byte rdi, 0
+      
+
+
+
+  print_str: ; takes pointer to string in rdi and retuns in rax
+    push rsi
+    push rdx
+    mov rsi, rdi
+
+    mov rdx, 0
+    .count_loop:
+      cmp byte [rsi+rdx], 0
+      je .print
+      inc rdx
+      jmp .count_loop
+
+    .print:
+      mov rax,SYS_WRITE
+      mov rdi,STDOUT
+      syscall
+      
+      pop rdx
+      pop rsi
+      ret
+
+  print_at_pos:
+    
+
+    
+  _start:
+    mov rdi,clear
+    call print_str
+  
+    mov rdi,hello
+    call print_str
+
+    mov rdi,test
+    call print_str
+
+    mov rax,SYS_EXIT
+    mov rdi,0; return code
+    syscall