Local Variables

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Force

Joined: 12 Jun 2012
Posts: 29

Force 13 Feb 2014, 19:01

Dword is ok. it works
but Byte (Hello Word message ) gives error in local defination inthis simple code
why ?

Code:

format PE GUI 4.0
include '\fasm\include\win32a.inc'
entry start

section '.data' data readable writeable



section '.code' code readable executable
start:

stdcall testing
invoke ExitProcess,NULL

proc testing

locals
  cnt dd ?
  msg db "Hello, World!",0
endl

mov [cnt],25


invoke MessageBox,NULL,msg,0,0

ret
endp

section '.idata' import data readable writeable
library kernel32,'KERNEL32.DLL',\
          user32,'USER32.DLL'


include '\fasm\include\api\kernel32.inc'
include '\fasm\include\api\user32.inc'

13 Feb 2014, 19:01

typedef

Joined: 25 Jul 2010
Posts: 2909
Location: 0x77760000

typedef 13 Feb 2014, 19:19

Another thing is to make sure you put a dummy value in your data section or just remove it. FASM will generate an invalid PE if you leave it out empty.

13 Feb 2014, 19:19

Force

Joined: 12 Jun 2012
Posts: 29

Force 13 Feb 2014, 19:58

Code:

format PE GUI 4.0
include '\fasm\include\win32a.inc'
entry start

section '.data' data readable writeable

Buffer db 'Hello Word',0

section '.code' code readable executable
start:

stdcall testing
invoke ExitProcess,NULL

proc testing

locals
  cnt dd ?
  msg rd 50
endl

mov [cnt],25


invoke lstrcpy,msg,Buffer

ret
endp

section '.idata' import data readable writeable
library kernel32,'KERNEL32.DLL',\
          user32,'USER32.DLL'


include '\fasm\include\api\kernel32.inc'
include '\fasm\include\api\user32.inc'

error again

13 Feb 2014, 19:58

Walter

Joined: 26 Jan 2013
Posts: 155

Walter 13 Feb 2014, 20:39

lea eax,[msg]
invoke lstrcpy,eax,Buffer

13 Feb 2014, 20:39

Force

Joined: 12 Jun 2012
Posts: 29

Force 13 Feb 2014, 21:06

Thank you Walter
it works now

13 Feb 2014, 21:06

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