最近再看《Orange‘s一个操作系统的实现》,里面用的是intel的汇编语法,自己比较习惯AT&T的语法了,自己研究了好长时间才将代码修改成功。
.code16 .section.text .globl_start _start: movw%cs,%ax movw%ax,%ds movw%ax,%es callDispStr loop1:jmploop1 DispStr: movw$BootMessage,%ax movw%ax,%bp movw$0x10,%cx movw$0x1301,%ax movw$0xc,%bx movb$0,%dl int$0x10 ret BootMessage:.ascii "Hello, OS world!" .org510 .word0xAA55.code16指示as生成16位的代码。While `as' normally writes only "pure" 32-bit i386 code or 64-bit x86-64 code depending on the default configuration, it also supports writing code to run in real mode or in 16-bit protected mode code segment.
编译的话 as -o boot.o boot.s ;
ld -Ttext=0x7c00 --oformat binary -o boot.bin boot.o;
这样就ok了~~