What is a NULL in hexadecimal

Question

I have to debug a C application in assembler. I want to know if a register is containing a NULL . I need for that the hex value of that.

Note:

I use a PPC

Ehm... why do you think you need the hex version of the value? — Mr Lister, Nov 28 '12 at 12:07

score 8 · Accepted Answer · edited Sep 11 '19 at 23:32

8

Null is 00 in hexadecimal.

edited Sep 11 '19 at 23:32

Blake Neal

answered Nov 28 '12 at 12:06

Rahul Tripathi

1

Don't you mean 00h? ;-) ;-) – Brian Knoblauch Nov 28 '12 at 12:49
1

No, he meant 0x00 ;-) – Blake Neal Sep 11 '19 at 19:56
1

@Blake: http://www.asciitable.com/ or the OP's original link have nothing to do with this; the question is about NULL, not NUL. But yes, I think all PowerPC compilers use `0` as the object-representation for NULL pointers. The C standard doesn't require that, though, and apparently there is/was at least one real-world C implementation that used a non-zero bit-pattern for `(void*)0` aka `NULL`. – Peter Cordes Sep 17 '19 at 05:54

1 Answers1