linux-kernel - Re: [PATCH] tracehook: add some self tests

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Message-ID: <8bd0f97a1002151228r2a589047gddc1d998d52c969c@mail.gmail.com>
Date:	Mon, 15 Feb 2010 15:28:29 -0500
From:	Mike Frysinger <vapier.adi@...il.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tracehook: add some self tests

On Mon, Feb 15, 2010 at 14:39, Oleg Nesterov wrote:
> On 02/15, Mike Frysinger wrote:
>> +static int __init syscall_test(void)
>> +{
>> +     struct pt_regs _regs, *regs = &_regs;
>> +     long _args[8];
>> +     long *args = _args + 1;
>> +     long *sys_args[6], *sa;
>> +     unsigned int i, n, s;
>> +
>> +     /*
>> +      * First find each system register in pt_regs.  We have to assume
>> +      * syscall_set_arguments() works with very basic arguments.
>> +      */
>> +     pr_info("TEST: asm/syscall.h: arg offsets: { ");
>> +
>> +     for (s = 0; s < 6; ++s)
>> +             args[s] = s;
>> +     memset(regs, 0xad, sizeof(*regs));
>> +     syscall_set_arguments(NULL, regs, 0, 6, args);
>                              ^^^^
>
> I am not sure ia64 can tolerate task == NULL. Hmm, even x86 checks
> task_thread_info(task)->status.

is there some task available while the kernel is initializing ?  i.e.
the test is compiled in ?

if current is valid, i'll just [ab]use that ...
-mike
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