配置开发环境

方法一:

• 打开命令行,输入指令which nasm查看nasm的安装路径，Mac系统默认安装了nasm.一般默认返回的路径是/usr/bin/nasm
• 接着输入指令alias nasm=/usr/bin/nasm
• 输入指令nasm -v如果配置成功的话，就会返回nasm的版本号NASM version 2.14.02 compiled on Dec 27 2018，
  如果配置失败就会返回:macs-MacBook-Pro:~ mac$ nasm nasm: error: unable to find utility "nasm", not a developer tool or in PATH

方法二:

如果第一种方法配置失败了，那么考虑第二种方法。重装nasm

• brew reinstall nasm

测试helloworld代码

• 命令行输入指令vim helloworld.asm，新建helloworld文件，文件类型为asm

helloworld汇编代码

SECTION .data
msg: db "Hello World!", 0x0a
len: equ $-msg
SECTION .text
global _main
kernel:
    syscall
    ret
_main:
    mov rax,0x2000004
    mov rdi,1
    mov rsi,msg
    mov rdx,len
    call kernel
    mov rax,0x2000001
    mov rdi,0
    call kernel

然后输入如下指令

nasm -f macho64 -o helloworld.o helloworld.asm

ld -o helloworld -e _main helloworld.o -macosx_version_min 10.13 -lSystem

./helloworld

运行结果

Hello World!

参考文献

• https://www.zhihu.com/question/29960200
• http://type.so/assembly/mac-nasm-helloworld.html
• https://stackoverflow.com/questions/52830484/nasm-cant-link-object-file-with-ld-on-macos-mojave
• https://stackoverflow.com/questions/53974320/how-can-i-get-nasm-to-work-as-a-command-in-terminal-in-macos
• http://caswenson.com/2009_09_26_assembly_language_programming_under_os_x_with_nasm
• http://www.ruanyifeng.com/blog/2018/01/assembly-language-primer.html