In a website I`ve seen a command like this:
test bl al, bl al
jz 0xaddress
What does this mean?
Does this belong to a specific compiler to generate such these assembly codes?
-
4where is this output from? looks like a buggy disassembler.– Igor Skochinsky ♦Commented Nov 27, 2017 at 17:39
-
This is not a valid x86 assembly instruction, could you perhaps attach a print screen or a direct copy of the instruction in front of you?– NirIzrCommented Nov 30, 2017 at 18:28
Add a comment
|
1 Answer
If we're talking about x86 assembly, then the syntax is invalid as the TEST instruction works on two operands
the correct syntax would TEST op1,op2 and it'll perform a bitwise AND on op1 and op2, discard the result, and change the flags accordingly
-
inevitably your are right. I have confused when I`ve seen this command.– JohnCommented Nov 27, 2017 at 15:15
-
1glad I could help. make sure to specify what type of assembly we're talking about in the tags/question next time.– NotGICommented Nov 27, 2017 at 15:17
-
I forgot to mention x86. But no good answer yet. I think it has another answer...– JohnCommented Nov 27, 2017 at 15:35