^^
ARM Assembler is very easy to learn due to the very flexible three operand opcodes. After MIPS it is the most straight forward assembler dialect out there. If you know one dialect of assembler you can become a fluent ARM-assembler programmer over a weekend.
AREA Example, CODE, READONLY ; declare code segment 'Example'
ENTRY ; 标识程序入口
CODE32 ； 32-bit arm instruction
--- assembly code ---
END ; 结束
why windows ?
b 指令
-32MB~+32MB
使用32位中的24位存储偏移地址*4 （16M*4=64M）（+32M～-32M）跳转