Difference between revisions of "Machine language"
From ThorstensHome
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| eb fd || short jump to executing the byte before eb || | | eb fd || short jump to executing the byte before eb || | ||
|- | |- | ||
− | | fa || cli | + | | fa || cli || This will clear the interrupt flag in the processor meaning interrupts will not be processed after the flag is set again. This means a high risk - no more keyboard input etc.. So this is a privileged command and may only be executed by the operating system. |
|} | |} |
Revision as of 09:46, 4 December 2014
This shows a mapping of x86 machine language to assembler
x86 machine language | assembler command | remark |
---|---|---|
54 | push rsp | |
85 c0 | test eax,eax | |
90 | NOP | |
b8 00 00 00 00 | mov eax,0x0 | |
c3 | ret | |
cd 10 | int 10 | |
eb fd | short jump to executing the byte before eb | |
fa | cli | This will clear the interrupt flag in the processor meaning interrupts will not be processed after the flag is set again. This means a high risk - no more keyboard input etc.. So this is a privileged command and may only be executed by the operating system. |