flat assembler
Message board for the users of flat assembler.
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Is there document about NTVDM api? With new AVX instruction set will the hack stop working?
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0xc4, 0xc4 = les eax,esp?
That would certainly become a new VEX prefix with AVX in the CPU. |
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It should be using ud2 (or ud0/ud1) to guarantee an invalid opcode. All other encodings might be used for future instructions that don't yet exist.
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revolution wrote: It should be using ud2 (or ud0/ud1) to guarantee an invalid opcode. All other encodings might be used for future instructions that don't yet exist. |
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0xc4,0xc4 also raises an exception. It is supposed to be a invalid instruction, just like ud2.
The difference is that 0xc4,0xc4 is not guaranteed to always be invalid. Ud2 is. |
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