Adressing mode

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penguinglx

Joined: 05 Aug 2007
Posts: 10

penguinglx 25 Aug 2007, 06:38

fld dword 20[ebp]

I got error message for that :invalid operand
can anyone fix that for me ,I read a assembly book , it mentioned about that kind of addressing mode for 80386 and later processors , but I cant make it work with fasm

thanks

25 Aug 2007, 06:38

madmatt

Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA

madmatt 25 Aug 2007, 06:45

With fasm it would be: fld dword [ebp + 20]
looks like masm code?

25 Aug 2007, 06:45

penguinglx

Joined: 05 Aug 2007
Posts: 10

penguinglx 25 Aug 2007, 07:03

thanks , one more question

Function1:
db c3h ->>> this is Ret instruction

I got Error Message :undefined symbol

help me, why I cant write the opcode

25 Aug 2007, 07:03

0.1

Joined: 24 Jul 2007
Posts: 474
Location: India

0.1 25 Aug 2007, 07:55

do this:

Code:

db 0c3h

the value is misinterpreted as a symbol. think about it.

25 Aug 2007, 07:55

sinsi

Joined: 10 Aug 2007
Posts: 794
Location: Adelaide

sinsi 25 Aug 2007, 09:11

heh heh...

0.1

bet you don't make that mistake eh Laughing

25 Aug 2007, 09:11

0.1

Joined: 24 Jul 2007
Posts: 474
Location: India

0.1 25 Aug 2007, 09:35

yeah sinsi I never made that mistake (so far!) myself Wink

what does "sinsi" mean?

25 Aug 2007, 09:35

sinsi

Joined: 10 Aug 2007
Posts: 794
Location: Adelaide

sinsi 25 Aug 2007, 10:44

"sinsi" was my dog's name...so sad I know but

Quote:

Man's best friend

etc...

25 Aug 2007, 10:44

0.1

Joined: 24 Jul 2007
Posts: 474
Location: India

0.1 25 Aug 2007, 12:57

25 Aug 2007, 12:57

DOS386

Joined: 08 Dec 2006
Posts: 1903

DOS386 25 Aug 2007, 23:47

0.1 wrote:

do this:
Code:
db 0c3h    

Don't do this.

Code:

db $C3

_________________
Bug Nr.: 12345

Title: Hello World program compiles to 100 KB !!!

Status: Closed: NOT a Bug

25 Aug 2007, 23:47

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