smali - 以下 smali 术语是什么意思？

Question

我最近一直在研究一些 smali 编码文件，其中有一些我不理解的术语，并且在任何地方都没有解释(甚至在 dalvik 操作码站点中也没有)。让我们开始回答问题

1. What is ->?
2. What is (somerandomletter):I, F, J, S, C, B etc. (any element encoding letter)? 
   example of both in one: Lcom/google/android/gms/games/achievement/AchievementEntity;->j:I
3. What is this god damned v1, v2, v3, or v4 I see everywhere?
   ex. const-string/jumbo v1, "Type"
4. What is invoke-static and invoke-interface?
   ex. invoke-interface {p0},      Lcom/google/android/gms/games/achievement/Achievement;->n()J
   ex. invoke-static {v2}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;
5. What are interfaces and public or private fields?

Answer 1

1. -> 是用于表示成员(方法或字段)的语法。
2. 这些是原始类型。它们记录在 https://source.android.com/devices/tech/dalvik/dex-format.html (搜索“类型描述符语义”)。另请参阅https://github.com/JesusFreke/smali/wiki/TypesMethodsAndFields

Lcom/google/android/gms/games/achievement/AchievementEntity;->j:I 是对字段的引用。 Lcom/google/android/gms/games/achievement/AchievementEntity; 是包含字段的类，-> 是表示成员的语法，j 是字段的名称，: 只是分隔符，I 是字段的类型 (int)。

这些是寄存器。您可以在 https://source.android.com/devices/tech/dalvik/dalvik-bytecode.html 找到更多信息和 https://github.com/JesusFreke/smali/wiki/Registers

这些记录在 https://source.android.com/devices/tech/dalvik/dalvik-bytecode.html

invoke-static is used to invoke a static method (which is always considered a direct method).

invoke-interface is used to invoke an interface method, that is, on an object whose concrete class isn't known, using a method_id that refers to an interface.

它们与接口(interface)、公共(public)和私有(private)字段的标准 java 概念相匹配。