Hi, can anyone give me a comprehensive description about ORG directive?
When and why is it used in assembly written applications?
Using Nasm on x86 or AMD64.
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A:
ORG is used to set the assembler location counter. This may or may not translate to a load address at link time. It can be used to define absolute addresses, e.g. when defining something like interrupt vectors which may need to be at a fixed address, or it can be used to introduce padding or generate a specific alignment for the following code.
Paul R
2010-08-04 15:37:28
Note also that the meaning of the `ORG` directive can vary between assemblers. For instance, using it to produce padding as Paul mentions will work on MASM, but [not on NASM](http://developer.apple.com/mac/library/documentation/DeveloperTools/nasm/nasmdo10.html#section-10.1.3).
bcat
2010-08-05 12:40:23
`ORG' is an abbreviation for "origin".
starblue
2010-08-05 19:13:45