Question

我正在编写程序集，我的代码适用于近似跳转（如下所示，指令执行）：

org 0x500
jmp main

%include "smallFile.inc"

main:
    ;start instructions, these instructions get executed

但是，当我包含多个文件，较大的文件（以下）时，它不会跳转，指令不会被执行。我试图在“主要”助记符之前添加地址，我的理解可能会消失。

如何使以下情况有效？

org 0x500
jmp main

%include "smallFile1.inc"    ;couple bytes assembled and linked in
%include "smallFile2.inc"    ;couple bytes assembled and linked in
%include "smallFile3.inc"    ;couple bytes assembled and linked in
%include "LargeFile.inc"     ;couple hundred bytes assembled and linked in
%include "LargeFile2.inc"    ;couple hundred bytes assembled and linked in

main:
    ;start instructions, these are never reached

Answer 1

所以我正在做更多的挖掘，我偶然发现了以下资源：

http://books.google.com/books?id=veMTOpapeZkC&pg=PT327&lpg=PT327&dq=how+to+far+jump+to+label+assembly&source=bl&ots=_jHSgrwdfG&sig=C63QURL0FlVhDv_FFrDm1oevBfs&hl=en&sa=X&ei=zOWSUbWxGcWDyAH77ICoCA&ved=0CDwQ6AEwAjgK

我看到的是代码中有一个近乎跳跃的东西...... jmp near。我不知道在过去的几个小时里我是如何错过的。当我将其输入我的代码时，它解决了我的问题......

短跳是+ - 127个相对字节。一段内近跳跃高达2GB。跳远或跳远;我想我可能一直试图错误地使用跳远。

以下修复了我的代码;

org 0x500
jmp near main

%include "smallFile1.inc"    ;couple bytes assembled and linked in
%include "smallFile2.inc"    ;couple bytes assembled and linked in
%include "smallFile3.inc"    ;couple bytes assembled and linked in
%include "LargeFile.inc"     ;couple hundred bytes assembled and linked in
%include "LargeFile2.inc"    ;couple hundred bytes assembled and linked in

main:
    ;start instructions, these instructions are now reached.

感谢所有看过这个问题的人试图解决我的问题。希望有一天这会帮助某人。

在jmp / far jmp附近组装到助记实模式

1 个答案: