example-structures.smali

转载自 ：http://androidcracking.blogspot.com/p/way-of-android-cracker-lessons.html（得）

many people find this blog by searching for smali syntax examples and finding a previous post onexample smali syntax. since i originally hastily wrote it, i have learned more so i updated it as best i could for now. more helpfully, i worked out a syntax highlighter for smali usingsyntaxhighlighter. i'll upload itsomewhere officialwhen i'm finished so others can use it. because i know there are throngs of people just itching to have highlighted smali code!

so for the googler's out there trying to make sense of smali, here's example-structures.smali fromlesson 1 from way of the android cracker.

.class publicLcom/lohan/crackme1/example;

.superLjava/lang/Object;

.source"example.java"

# staticfields

.field privatestatic Counter:I

# directmethods

# all theconstructor does is set Counter to 0x10 (or 16)

.method publicconstructor <init>()V

.registers 2

.prologue

.line 11

invoke-direct {p0},Ljava/lang/Object;-><init>()V

const/16 v0, 0x10

sput v0,Lcom/lohan/crackme1/example;->Counter:I

return-void

.end method

.method publicstatic ArrayExample()V

.registers 4

.prologue

const/4 v3, 0x1

const/4 v2, 0x0

.line 50

const/4 v1, 0x5

new-array v0, v1, [Ljava/lang/String;

.line 52

.local v0, someArray:[Ljava/lang/String;

# put value v1 inside array v0 at index v2(0x0)

const-string v1, "set value at index0"

aput-object v1, v0, v2

.line 53

# put value v1 inside array v0 at index v3(0x1)

const-string v1, "index 1 has thisvalue"

aput-object v1, v0, v3

.line 55

# store in v1 the value from array v0 atindex v2

aget-object v1, v0, v2

# store in v2 the value from array v0 atindex v3

aget-object v2, v0, v3

# compare two strings

invoke-virtual {v1, v2},Ljava/lang/String;->equals(Ljava/lang/Object;)Z

move-result v1

# if equals() returns 0, it means they arenot equal, so just return

if-eqz v1, :cond_1e

.line 57

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

const-string v2, "array at index 0 = 1(wont happen)"

invoke-virtual {v1, v2},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

.line 59

:cond_1e

return-void

.end method

# loop from 0to Counter

# just a fewlines in java

.method publicstatic LoopExample()V

.registers 4

.prologue

.line 15

const/4 v0, 0x0

.local v0, i:I

:goto_1

sget v1,Lcom/lohan/crackme1/example;->Counter:I

if-lt v0, v1, :cond_6

.line 17

return-void

.line 16

:cond_6

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

new-instance v2, Ljava/lang/StringBuilder;

const-string v3, "current val forloop: "

invoke-direct {v2, v3},Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

invoke-virtual {v2, v0},Ljava/lang/StringBuilder;->append(I)Ljava/lang/StringBuilder;

move-result-object v2

invoke-virtual {v2},Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

move-result-object v2

invoke-virtual {v1, v2},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

.line 15

add-int/lit8 v0, v0, 0x1

goto :goto_1

.end method

.method publicstatic SwitchExample()V

.registers 3

.prologue

.line 21

const/16 v0, 0x2a

.line 22

.local v0, val:I

# begin the switch

# look down at .sparse_switch directive

sparse-switch v0, :sswitch_data_2e

# switch default just passes through tohere

.line 27

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

const-string v2, "invalid value"

invoke-virtual {v1, v2},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

.line 29

:goto_c

return-void

.line 23

:sswitch_d # if v0 is 1, we'll be here

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

const-string v2, "val 1"

invoke-virtual {v1, v2},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

goto :goto_c

.line 24

:sswitch_15 # if v0 is 2

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

const-string v2, "val 2"

invoke-virtual {v1, v2},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

goto :goto_c

.line 25

:sswitch_1d # if v0 is 42

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

const-string v2, "val 42"

invoke-virtual {v1, v2}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V

goto :goto_c

.line 26

:sswitch_25 # if v0 is 5

sget-object v1,Ljava/lang/System;->out:Ljava/io/PrintStream;

const-string v2, "val 5"

invoke-virtual {v1, v2},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

goto :goto_c

.line 22

nop

:sswitch_data_2e

# if v0 is 0x1 goto :sswitch_d

# if 0x2 :sswitch_15

# and so on...

.sparse-switch

0x1 -> :sswitch_d # 1

0x2 -> :sswitch_15 # 2

0x5 -> :sswitch_25 # 5

0x2a -> :sswitch_1d # 42

.end sparse-switch

.end method

.method publicstatic TryCatchExample()V

.registers 8

.prologue

const-string v7, ": "

.line 33

const-string v3, "google.com"

.line 36

.local v3, urlStr:Ljava/lang/String;

# begin try here

:try_start_4

new-instance v2, Ljava/net/URL;

invoke-direct {v2, v3},Ljava/net/URL;-><init>(Ljava/lang/String;)V

.line 37

.local v2, url:Ljava/net/URL;

invoke-virtual {v2},Ljava/net/URL;->openStream()Ljava/io/InputStream;

move-result-object v1

.line 38

.local v1, is:Ljava/io/InputStream;

invoke-virtual {v1},Ljava/io/InputStream;->close()V

:try_end_10

# end of the try

# if there was a MalformedURLException,goto :catch_11

.catch Ljava/net/MalformedURLException;{:try_start_4 .. :try_end_10} :catch_11

# IOException goes to :catch_36

.catch Ljava/io/IOException; {:try_start_4.. :try_end_10} :catch_36

# ifNO exception, just pass through:

.line 46

.end local v1 #is:Ljava/io/InputStream;

.end local v2 #url:Ljava/net/URL;

:goto_10

return-void

.line 39

:catch_11

# move the exception to v4, then to v0

# allof the code below is what happens with an exception

move-exception v4

move-object v0, v4

.line 41

.local v0,e:Ljava/net/MalformedURLException;

sget-object v4,Ljava/lang/System;->out:Ljava/io/PrintStream;

new-instance v5, Ljava/lang/StringBuilder;

const-string v6, "Invalid URL "

invoke-direct {v5, v6},Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

invoke-virtual {v5, v3},Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

const-string v6, ": "

invoke-virtual {v5, v7},Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

invoke-virtual {v0},Ljava/net/MalformedURLException;->getMessage()Ljava/lang/String;

move-result-object v6

invoke-virtual {v5, v6},Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

invoke-virtual {v5},Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

move-result-object v5

invoke-virtual {v4, v5},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

goto :goto_10

.line 42

.end local v0 #e:Ljava/net/MalformedURLException;

# end exception code

# begin exception code

:catch_36

move-exception v4

move-object v0, v4

.line 44

.local v0, e:Ljava/io/IOException;

sget-object v4,Ljava/lang/System;->out:Ljava/io/PrintStream;

new-instance v5, Ljava/lang/StringBuilder;

const-string v6, "Unable to execute"

invoke-direct {v5, v6},Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

invoke-virtual {v5, v3},Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

const-string v6, ": "

invoke-virtual {v5, v7},Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

invoke-virtual {v0},Ljava/io/IOException;->getMessage()Ljava/lang/String;

move-result-object v6

invoke-virtual {v5, v6},Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

invoke-virtual {v5},Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

move-result-object v5

invoke-virtual {v4, v5},Ljava/io/PrintStream;->println(Ljava/lang/String;)V

goto :goto_10

# end exception code

.end method