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我正在编写程序集，我的代码适用于近距离跳转（如下所示，指令被执行）：

org 0x500
jmp main

%include "smallFile.inc"

main:
    ;start instructions, these instructions get executed

但是，当我包含多个文件、更大的文件（如下）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，我的理解可能不正确。

我将如何使以下情况起作用？

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
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1 回答 1

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所以我做了更多的挖掘，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=zOWSUbWxGcWDyAH7AEwAjCAgved=

我看到代码中有一个叫做near jump...jmp near的东西。我不知道在之前的几个小时里我是怎么错过的。当我将它输入到我的代码中时，它解决了我的问题......

短跳转是 +- 127 相对字节。一个段内的近跳转高达 2GB。远跳或段外；我想我可能一直在尝试错误地使用远跳。

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.

感谢所有试图解决我的问题的人。希望有一天这对某人有所帮助。

于 2013-05-15T02:07:59.160 回答