Date: Tue, 13 Mar 2001 16:29:44 +0100 (CET) From: milunovic <milunovic@sendmail.ru> To: "Nickolay A. Kritsky" <nkritsky@internethelp.ru> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD asm problem Message-ID: <Pine.BSF.4.21.0103131625510.1040-100000@scorpion.cosmos.all.net> In-Reply-To: <00b701c0abca$624b7630$0600a8c0@ibmka.internethelp.ru>
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On Tue, 13 Mar 2001, Nickolay A. Kritsky wrote:
> Hi all!
> It seems to me that you guys are my last hope, but if i am asking in the
> wrong place - sorry.
>
> I wrote my first asm program for FreeBSD:
>
> section .code
> global _start
> _start:
> push dword envp
> push dword argvp
> push dword fname
> mov eax,59 ; execve
Here you must push long (dword) because int 0x80 expects EIP
main :
pushl 3rd
pushl 2nd
pushl 1st
call execve <--- call will push EIP on stack
execve :
leal $0x3b,%eax
int $0x80
Stack should be ->
[EIP][1st][2nd][3rd] but instead EIP you can just push anything you
want.
Vojislav Milunovic
milunovic@sendmail.ru
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