help proc params.

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Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 11 Jan 2016, 19:41

My proc:

Code:

proc Pr1 Name : DWORD, Param : i need 64 bytes !!!
endp

I need size Param = 64 or more (128 bytes), how do this ?

11 Jan 2016, 19:41

Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 12 Jan 2016, 10:07

struct MyStr
x dd 0
y dd 0
z dd 0
flag dd 0
op1 dd 0
op2 dd 0
ends
i mean Param : MyStr

12 Jan 2016, 10:07

Picnic

Joined: 05 May 2007
Posts: 1403
Location: Piraeus, Greece

Picnic 12 Jan 2016, 14:32

Pass a pointer to a MyStr structure.

Code:

stdcall Pr1, arg, MyStr1

Make a local copy of structure.

Code:

proc Pr1 Name : DWORD, Param : DWORD

  local mystr : MyStr

  ; mystr = Param  
  mov esi, dword [Param] 
  lea edi, dword [mystr] 
  mov ecx, sizeof.MyStr
  cld
  rep movsb
  
  ;
  ;

  ret
endp

Excuse me if I get it wrong what you ask.

12 Jan 2016, 14:32

Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 13 Jan 2016, 06:09

Thanks Picnic.
I understand.
For Proc maximum QWORD size for one argument.
Thi is might be pointer to any data\struct.

13 Jan 2016, 06:09

jiangfasm

Joined: 08 Mar 2015
Posts: 60

jiangfasm 19 Jan 2016, 16:09

proc Pr1 Name : DWORD, Param : qword
endp

Are you writing win32 program?

19 Jan 2016, 16:09

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