Way to Reference an offset through a name

[AgentSmithers]

mytest db "Hello World" db 5 <0>

Something like this would have a byte array like "Helloworld<0><0><0><0><0>"


But is their a way to reference a offset in mytest through a variable name without using any + signs

mytest db "Hello World",
MytestOffset11 db 5 <0>

or is above the best way so i can reference it after hello world so when i print it out or pass it through a function I can just pass mytest for the complete string or mytestOffset11 for just whats after it.

EDIT: to create a local var we use LOCAL MYVAR:DWORD

How would I put Hello world in a Local in the Declare statment

Somehting like LOCAL MYstr:Byte "Helloworld"

??

Thanks!
-Agent

[Jimg]

Yes, you can put a label anywhere like

mytest db "Hello World"
MyTestOffset11 db 5 dup 0


but you can't initialize a local in a proc because the local can be anywhere in the stack at run time.  You can manually put the string in a local each time the proc is called, but that doesn't save anything, in fact it uses much more memory-

testmy proc
local MYstr[11]:byte

lea edi,MYstr
mov al,"H"     ; just one of hundreds of ways to store a character
stosb
mov al,"e"
stosb
... etc.

[AgentSmithers]

Well I got a Global Var and  local var I want to copy into it

Will something like this work??

Code Select Expand

            mov ECX, LENGTHOF GlobalVar

                lea edi, LocalVar
                mov esi, OFFSET GlobalVar
            LoadMyString:
                mov edi, [esi]
                inc edi
                inc esi
            loop LoadMyString

[dedndave]

no
you are using the EDI register for two different things

        mov     esi,offset GlobalVar
        lea     edi,LocalVar
        mov     ecx,sizeof GlobalVar
        cld
        rep     movsb

[AgentSmithers]

Thanks  :lol

[Vortex]

Hi AgentSmithers,

You should also preserve esi,edi,ebx,esp and ebp if you are going to modify them.