From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] sys_clone() related info/help/pointer needed
Date: Tue, 27 May 2003 16:57:32 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590723706044@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590723705986@msgid-missing>
>>>>> On Thu, 22 May 2003 13:36:19 -0700 (PDT), Raj Patil <rpatil0296@yahoo.com> said:
Raj> The progam basically adds an entry to syscall table, and when
Raj> this new syscall is called, it simply calls sys_clone() with
Raj> same arguments. (like making a duplicate sys_clone call)
Raj> static long my_call(unsigned long flags, unsigned long sz) {
Raj> rc=sys_clone(flags, sz); /* sys_clone is exported */ ...... }
Raj> Everything seems to work excpet that the child process created
Raj> is not getting executed.
clone() (or, more correctly: clone2()) is special: it needs both a
pt_regs and a switch_stack structure at the top of the stack (see
comments in arch/ia64/kernel/process.c for copy_thread()). Your
test-case doesn't work because it probably isn't creating the
switch_stack structure at all.
--david
next prev parent reply other threads:[~2003-05-27 16:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-22 20:36 [Linux-ia64] sys_clone() related info/help/pointer needed Raj Patil
2003-05-27 16:57 ` David Mosberger [this message]
2003-05-30 16:21 ` Raj Patil
2003-05-30 17:47 ` David Mosberger
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