From owner-freebsd-emulation  Wed Jan 12 18:31:29 2000
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X-Mailer: exmh version 2.1.1 10/15/1999
To: freebsd-emulation@FreeBSD.ORG
Subject: Re: DUAL-brand ELF binaries 
In-reply-to: Your message of "Thu, 13 Jan 2000 02:34:30 +0100."
             <200001130134.CAA61708@dorifer.heim3.tu-clausthal.de> 
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Date: Wed, 12 Jan 2000 18:38:31 -0800
From: Mike Smith <msmith@freebsd.org>
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> Martin v.Loewis <loewis@cs.tu-berlin.de> wrote in list.freebsd-emulatio=
n:
>  > Sure there is. On Linux, "int 0x80" performs a system call. You can
>  > emit this instruction either directly (via assembler code), or via
>  > the _syscall<n> macros from <asm/unistd.h>.
> =

> But is that the usual, common and recommended way to issue
> syscalls?

That's one perfectly legitimate way of doing it, yes.

However, the real issue here is not system calls, it's the binary =

interface to libc.  If the third-party library binds to anything other =

than a clearly defined interface layer in the application, ie. it makes =

any calls at all into libc, the chances are good that it will fail =

because the interface to libc is defined at the source level, not the =

binary level.



-- =

\\ Give a man a fish, and you feed him for a day. \\  Mike Smith
\\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
\\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com




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