Extended enter/return macros

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inskipp

Joined: 23 Jun 2003
Posts: 25
Location: Poland

inskipp

In Windows we often use a code:

Code:

proc dummy,...
  enter
  push esi edi ebx
  ..
  pop ebx edi esi
  return

I was thinging about replace this by simple:

Code:

proc dummy,...
  enter esi,edi,ebx
  ..
  return

Of course esi, edi and ebx are only example, only chosen registers should be saved.
Can someone help me to write such macro?
Extend enter macro to push registers is easy, but i have no idea how to restore proper registers at the end of procedure.
I thing it could be useful.

08 Jul 2003, 21:55

BiDark

Joined: 22 Jun 2003
Posts: 109
Location: .th

BiDark

Why don't you extend the 'return' macro? Rolling Eyes

09 Jul 2003, 02:13

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 7999
Location: Kraków, Poland

Tomasz Grysztar

This should work:

Code:

macro enter [reg]
 { common
    rb (4 - ($-dynamic_data) and 11b) and 11b
    dynamic_size = $ - dynamic_data
    end virtual
    enter dynamic_size,0
    used_regs equ
   forward
    used_regs equ reg used_regs
    if ~ reg eq
     push reg
    end if }

macro return
 { if ~ used_regs eq
    pop used_regs
   end if
   leave
   ret ..ret }

09 Jul 2003, 20:35

inskipp

Joined: 23 Jun 2003
Posts: 25
Location: Poland

inskipp

It works. Thx.

09 Jul 2003, 21:50

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