Android smali语法

smali语法

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本文由 Luzhuo 编写,转发请保留该信息.
原文: https://blog.youkuaiyun.com/Rozol/article/details/88368358

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smali是什么, 官方的简介

smali/baksmali is an assembler/disassembler for the dex format used by dalvik, Android’s Java VM implementation. The syntax is loosely based on Jasmin’s/dedexer’s syntax, and supports the full functionality of the dex format (annotations, debug info, line info, etc.)
smali / baksmali是Android的Java VM实现dalvik使用的dex格式的汇编程序/反汇编程序。语法松散地基于Jasmin的/ dedexer的语法，并支持dex格式的全部功能（注释，调试信息，行信息等）

Java代码

public int show(String str){
   
    return 1;
}

smali代码

# virtual methods
.method public show(Ljava/lang/String;)I
    .locals 1
    .param p1, "str"    # Ljava/lang/String;

    .line 22
    const/4 v0, 0x1

    return v0
.end method

数据类型 / 对象 / 数组 的写法, 对于经常JNI开发的童鞋肯定非常熟悉, 没错, 跟javap生成签名类型是一样的.

数据类型

smali类型	java类型	Description
V	void (用于返回类型)	-
Z	boolean	不同
B	byte	-
S	short	-
C	char	-
I	int	-
J	long (64 bits)	不同
F	float	-
D	double (64 bits)	-

运算

smali

mul-int v0, p1, p2

add-int / add-long / add-float / add-double / add-int/lit16 / add-int/lit8

smali运算符	Description	int	long	float	double
add-int v0, p1, p2	v0 = p1 + p2	√	√	√	√
sub-int v0, p1, p2	v0 = p1 - p2	√	√	√	√
mul-int v0, p1, p2	v0 = p1 * p2	√	√	√	√
div-int v0, p1, p2	v0 = p1 / p2	√	√	√	√
rem-int v0, p1, p2	v0 = p1 % p2	√	√	√	√
and-int v0, p1, p2	v0 = p1 & p2	√	√	×	×
or-int v0, p1, p2	v0 = p1 │ p2	√	√	×	×
xor-int v0, p1, p2	v0 = p1 ^ p2	√	√	×	×