dup doesn't work with labels

[ramguru]

I'm making a jump table. The problem is that "dq 400h dup L_WM_DEFAULT" will initialize just one item :(

Code Select Expand


DATA
; jmp table START
ALIGN 8
msg_table   dq L_WM_CREATE, L_WM_DESTROY, L_WM_DEFAULT, L_WM_SIZE
    dq 400h dup L_WM_DEFAULT

; jmp table END
..
WinProc FRAME hWin, uMsg, wParam, lParam

and    rdx, 03ffh ; rdx -> uMsg

mov    rcx, [msg_table+rdx*8]

jmp    rcx
L_WM_CREATE:
; some code
jmp >>.done
L_WM_DESTROY:
; some code
jmp >>.done
L_WM_DEFAULT:
invoke DefWindowProc, [hWin], [uMsg], [wParam], [lParam]
ret
.done
xor    rax, rax
ret
ENDF


DATA section dump:

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data:0000000010002000  0E 12 00 10 00 00 00 00  13 12 00 10 00 00 00 00  ................
data:0000000010002010  DC 12 00 10 00 00 00 00  39 12 00 10 00 00 00 00  ........9.......
data:0000000010002020  DC 12 00 10 00 00 00 00  00 00 00 00 00 00 00 00  ................
data:0000000010002030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ................
data:0000000010002040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ................
...


[ToutEnMasm]

Hello,
The dup operator must be place between the type of varaible and the value they have

dq   L_WM_DEFAULT dup (400h)

[ramguru]

Hello,
The dup operator must be place between the type of varaible and the value they have

dq   L_WM_DEFAULT dup (400h)

Now let's see:

TYPE        VALUE                    COUNT
dq      L_WM_DEFAULT    dup (400h)

You really make no sense  :wink

[dedndave]

i might try this
dq 1024 dup(L_WM_DEFAULT)

[ramguru]

Thanks I gave a try, but it didn't help - same thing :S

[jj2007]

i might try this
dq 1024 dup(L_WM_DEFAULT)

Is it a size issue? Try one of these:

dd 2*1024 dup(L_WM_DEFAULT)
dd 2*1024 dup(0, L_WM_DEFAULT)
dd 2*1024 dup(L_WM_DEFAULT, 0)

[ramguru]

Bad news: none of those methods did solve the problem.. also expression like "..dup (x,y)" won't compile, instead "..dup x,y" will do
edit > but wait "..dup x,y" means something else (damn)

[ToutEnMasm]

Now let's see:

TYPE        VALUE                    COUNT
dq      L_WM_DEFAULT    dup (400h)

You really make no sense 

Perhaps could you verify what others say to you
This one works perfectly

number equ 145
.data
chose dq number dup (0ffh)

[jj2007]

I'm making a jump table. The problem is that "dq 400h dup L_WM_DEFAULT" will initialize just one item :(

Is that a GoAsm only problem, or does it fail also in Masm?

[ramguru]

I suspect it's only goasm related. Since only goasm has full 64bit support & user is not required to mess with stack using it.
Though haven't tested on masm.
Now I'm using immediate value, will wait until this prob gets fixed :}

[MichaelW]

This works as expected with ML 6.14:

msg_table dq L_WM_CREATE, L_WM_DESTROY, 4 dup(L_WM_DEFAULT)

[Mark Jones]

If there are any problems, Jeremy is always willing to work with us. That is one of GoAsm's greatest features, IMO.

Also, did we check the documentation for "dup"?
http://www.jorgon.freeserve.co.uk/GoasmHelp/GoAsm.htm#dup

[donkey]

This seems to work fine for me...

somelabel DB 256 DUP IOCPARM_MASK

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Line 149: ### DbgDump 64 bytes (00403029 to 00403068)
00403029:  7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F   
00403039:  7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F   
00403049:  7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F   
00403059:  7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F-7F 7F 7F 7F   

As does..

somelabel DB MAX_PATH DUP IOCPARM_MASK

And ...

somelabel CHAR MAX_PATH DUP IOCPARM_MASK

The proper syntax is

LABEL TYPE COUNT DUP VALUE

I am using GoAsm version 0.56.6a

[ramguru]

This seems to work fine for me...
...
I am using GoAsm version 0.56.6a

Well, that proves only one thing - your "label" is obviously different from mine (I'm using 0.56.6b)
I'm sick of ppl indirectly suggesting me to RTFM, so made an example with my particular case, it's even 32bit :}
Just compile it see for your self, if app runs fine that would mean the problem is related with OS I'm using which is Windows 7 x64 7201 build.


[attachment deleted by admin]

[MichaelW]

Using GoAsm 0.56.03a I have not been able to find any syntax that will allow DUP to duplicate a label address. DUP does work as expected with a constant.

Edit: Same for 0.56.6b, and using OFFSET in place of ADDR makes no difference.

Code Select Expand


DATA SECTION
    lbl1 dd junk1, junk2, 4 dup junk3
    ;lbl2 dd ADDR junk1, ADDR junk2, 4 dup ADDR junk3
    ;lbl2 dd ADDR junk1, ADDR junk2, 4 DUP ADDR junk3
    ;lbl2 dd ADDR junk1, ADDR junk2, 4 DUP (ADDR junk3)
    ;lbl2 dd junk1, junk2, 4 DUP (ADDR junk3)
    ;lbl2 dd junk1, junk2, 4 DUP (junk3)
    lbl2 dd junk1, junk2, 4 DUP 12345678h

CODE SECTION

junk1:
nop
nop
nop
nop
junk2:
nop
nop
nop
nop
junk3:

START:

    invoke printf, "%xh%c", ADDR junk1, 10
    add esp, 12
    invoke printf, "%xh%c", ADDR junk2, 10
    add esp, 12
    invoke printf, "%xh%c%c", ADDR junk3, 10, 10
    add esp, 16

    lea esi, lbl1
    mov ebx, 6
  :
    invoke printf, "%xh%c", [esi], 10
    add esp, 12
    add esi, 4
    dec ebx
    jnz <

    lea esi, lbl2
    mov ebx, 6
  :
    invoke printf, "%xh%c", [esi], 10
    add esp, 12
    add esi, 4
    dec ebx
    jnz <

RET


Code Select Expand


401000h
401004h
401008h

401000h
401004h
401008h
0h
0h
0h
401000h
401004h
12345678h
12345678h
12345678h
12345678h