NASM

参考 NASM tutorial，新建一个 hello.asm 文件

section	.text
   global _start     ;must be declared for linker (ld)

_start:	            ;tells linker entry point
   mov	edx,len     ;message length
   mov	ecx,msg     ;message to write
   mov	ebx,1       ;file descriptor (stdout)
   mov	eax,4       ;system call number (sys_write)
   int	0x80        ;call kernel

   mov	eax,1       ;system call number (sys_exit)
   int	0x80        ;call kernel

section	.data
msg db 'Hello, world!', 0xa  ;string to be printed
len equ $ - msg     ;length of the string

# 进入 docker i386
$ docker exec -it xxx bash

# 安装 nasm 和 llvm
$ apt-get install nasm
$ apt-get install llvm

# 编译 & 测试

$ nasm -f elf hello.asm
$ ld -m elf_i386 -s -o hello hello.o
$ ./hello
Hello, world!

调试

https://stackoverflow.com/questions/13506629/lldb-break-at-address

$ nm ./hello
nm: ./hello: no symbols
$

References