Hello, world!

.gitignore

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+build

Makefile

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+.PHONY: all clean
+
+SRC := $(wildcard *.asm)
+OBJDIR := build
+OBJS := $(SRC:%.asm=$(OBJDIR)/%.o)
+BINS := $(SRC:%.asm=$(OBJDIR)/%)
+
+all: $(BINS)
+
+$(OBJDIR)/%: $(OBJDIR)/%.o
+	ld -m elf_i386 $< -o $@
+
+$(OBJDIR)/%.o: %.asm
+	mkdir -p $(OBJDIR)
+	nasm -f elf $< -o $@
+
+clean:
+	rm -rf $(OBJDIR)

README.md

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+# asm
+
+Build x86_64 assembly examples from [asmtutor.com](https://asmtutor.com)

helloworld.asm

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+; Hello World Program - asmtutor.com
+; Compile with: nasm -f elf helloworld.asm
+; Link with (64 bit systems require elf_i386 option): ld -m elf_i386 helloworld.o -o helloworld
+; Run with: ./helloworld
+
+SECTION .data
+msg     db      'Hello World!', 0Ah     ; assign msg variable with your message string
+
+SECTION .text
+global  _start
+
+_start:
+    mov     edx, 13     ; number of bytes to write - one for each letter plus 0Ah (line feed character)
+    mov     ecx, msg    ; move the memory address of our message string into ecx
+    mov     ebx, 1      ; write to the STDOUT file
+    mov     eax, 4      ; invoke SYS_WRITE (kernel opcode 4)
+    int     80h