Assembly Programming
Date: . Last updated: .
Register
- RAX: Accumulator
- RBX: Base
- RCX: Counter
- RDX: Data
- RSI: Source Index
- RDI: Destination Index
- RBP: Base Pointer
- RSP: Stack Pointer
- RIP: Instruction Pointer
- CS: Code Segment
- DS: Data Segment
- SS: Stack Segment
- ES: Extra Segment
- FS
- GS
- RFLAGS
- R8~R15
- b: byte
- w: word = 2 byte
- l: long word = 2 word = 4 byte
- q: quad word = 2 long word = 4 word = 8 byte
- $: Memory address
Instruction
Data Movement Instructions
- mov: Move
- push: Push on stack
- pop: Pop from stack
- lea: Load effective address
Arithmetic and Logic Instructions
- add: Integer addition
- sub: Integer subtraction
- inc,dec: Increment,Decrement
- imul: Integer multiplication
- idiv: Integer division
- and,or,xor: Bitwise logical and, or, and exclusive or
- not: Bitwise logical not
- neg: Negate
- shl,shr: Shift left and right
Control Flow Instructions
- jmp: Jump
- jcondition: Conditional jump
- cmp: Compare
- call, ret: Subroutine call and return
Memory Addressing
- Immediate Addressing
- Direct Addressing
- Register Addressing
- Register Indirect Addressing
- Register Relative Addressing
- Based Indexed Addressing
- Relative Based Indexed Addressing
ELF
ELF header: /usr/bin/elf.h
2's Complent Code
-79 -> 0XFF4F -> 0XFFB0 -> 补码: 0XFFB1
-112 -> 0XFF70 ->0XFF8F -> 补码: 0XFF90
10进制 ==> 其他进制:
除基取余, 倒排; 乘基取整
寻址方式
寄存器间接寻址: 把偏移地址放在寄存器中的寻址方式
move AX [BX] ;; 段基址: DS
move AX [BP] ;; 段基址: SS
move AX [SI] ;; 段基址: DS
move AX [DI] ;; 段基址: DS
寄存器相对寻址: 把偏移地址放在寄存器中的寻址方式
move AX 10[BX] ;; 段基址: DS
move AX 30[BP] ;; 段基址: SS
寄存器基址变址寻址:
move CX 100H[BX][DI] ;; 段基址: DS
move AX TABLE[BX][DI], AX ;; 段基址: SS
寄存器相对基址变址寻址:
lea edx, [esi + edi*4 + 100h];
gcc
gcc -S -masm=intel -Og -fverbose-asm test.c
dosbox
~/.doxbox/dosbox-0.74-3.conf
windowresolution=1280x960
output=overlay
[autoexec]
mount c /home/raymond/Downloads/mario&luigi/
c:
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