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. |
