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Title: passing reg::reg
Post by: ecube on January 13, 2007, 01:10:30 AM

what does eax::ebx mean?

Title: Re: passing reg::reg
Post by: GregL on January 13, 2007, 07:08:51 AM

Check this out. Note the INVOKE with eax::edx and edx::eax.


.586
.MODEL FLAT, stdcall
OPTION CASEMAP:NONE

INCLUDE windows.inc

INCLUDE kernel32.inc
INCLUDE msvcrt.inc

INCLUDELIB kernel32.lib
INCLUDELIB msvcrt.lib

someproc PROTO STDCALL,:QWORD,:QWORD

xqword$ MACRO xqwordvalue:REQ
    ; unsigned hex qword
    LOCAL buffer
    .DATA?
        buffer BYTE 20 dup(?)
    IFNDEF xqwfmt    
    .DATA    
        xqwfmt    BYTE "%I64X", 0
    ENDIF    
    .CODE
        push  DWORD PTR [xqwordvalue+4]
        push  DWORD PTR [xqwordvalue+0]
        push  OFFSET xqwfmt
        push  OFFSET buffer
        call  crt_sprintf
        add   esp, 16
        EXITM <OFFSET buffer>
ENDM

.CODE

start:

    mov eax, 0DEADBEEFh
    mov edx, 012345678h
    
    INVOKE someproc, eax::edx, edx::eax
    
    INVOKE ExitProcess, 0

someproc PROC qw1:QWORD, qw2:QWORD
    INVOKE crt_puts, xqword$(qw1)
    INVOKE crt_puts, xqword$(qw2)
    ret
someproc ENDP

END start

Title: Re: passing reg::reg
Post by: ecube on January 13, 2007, 08:02:04 AM

ahh using it with qwords makes more sense, alright thanks a lot guys :U

Title: Re: passing reg::reg
Post by: sinsi on January 13, 2007, 08:49:06 AM

Used to use it a lot in the 16-bit days.

Code Select


strlen PROTO C string:FAR PTR BYTE
...
INVOKE strlen,ES::BX
...

Thanks for the reminder Greg :U.

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General Forums => The Workshop => Topic started by: ecube on January 13, 2007, 01:10:30 AM