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Executable files

 
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# 8  
Old 10-30-2007
Quote:
Originally Posted by nervous
What is meant by native format????
Native implies it is compatible with the CPU in the machine and complies with the default ABI (Application Binary Interface) of the operating system.

Quote:
Originally Posted by nervous
A file compiled on x86-32 architecture under Windows XP, will it work on x86-64 architecture under Windows XP or Windows 2003?
Upto a point, it will be compiled to the WIN32 standard. Code can be compiled for Win32 and work without change from Windows 3.1 running WIN32S through to Windows Vista, as long as the calls it makes are implemented on that platform. Overtime APIs are added to a platform, if you restrict the set you call you can maintain good backward compatibility.

Note, the a x86-64 processor can run both 32bit and 64bit binary code. But a 386 cannot run 64 bit code natively.

Similarly an UltraSparcII can run both 32bit and 64bit SPARC code, but a DEC-Alpha is only available as 64bit, there is no 32bit equivalent.
# 9  
Old 10-30-2007
So you mean a code compiled under Windows XP(64-bit) will not work in Windows XP(32-bit)?
# 10  
Old 10-30-2007
Quote:
Originally Posted by nervous
So you mean a code compiled under Windows XP(64-bit) will not work in Windows XP(32-bit)?
Almost.

Code compiled for WIN64 will not run on any WIN32 platform.

You can still compile WIN32 code on a WIN64 platform.
 
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