Re: inside_SUB

[Maciej Hrebien <m_hrebien@wp.pl>]

ssams wrote:
> 
> by this code bellow i want print new line with the simple
> way
> i sub first char "49" with 39. but i did not get output
> like what i want
> output from this code is
> 1>>
> when i look at ascii code this second char value is 187.
> would some body expalin me...?
> 
> regard
> 
> .data
>  msg: .byte 49
> .text
> .globl _start
> _start:
>         mov $msg,%ecx
>         mov $1,%ebx
>         mov $1,%edx
>         mov $4,%eax
>         int $0x80
> 
>         mov %ecx,%eax
>         sub $39,%eax

xchg "sub $39,%eax" with "sub $39,(%eax)". %eax have a ptr value & You
access a memory using this ptr!

>         #ul %ebx
>         mov %eax,%ecx
>         mov $4,%eax
>         int $0x80
> 
>         mov $1,%eax
>         int $0x80

-- 
Maciej Hrebien