Someone asked me what the byte sequence is for an infinite loop in x86 machine code (it’s something you could use while debugging, for example).
That byte sequence is just 2 bytes long: EB FE.
It’s something you can check with nasm, for example.
File jump-infinite-loop.asm:
BITS 32
loop1:
jmp loop1
loop2:
jmp short loop2
jmp $
jmp short $
jmp short -2
nasm jump-infinite-loop.asm -l jump-infinite-loop.lst
File jump-infinite-loop.lst:
1 BITS 32
2
3 loop1:
4 00000000 EBFE jmp loop1
5 loop2:
6 00000002 EBFE jmp short loop2
7 00000004 EBFE jmp $
8 00000006 EBFE jmp short $
9 00000008 EB(FE) jmp short -2
Quickpost info
Didier Stevens 
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