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From: "Bruce Ellis" <bruce.ellis@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] 8c padding problem
Date: Sat, 22 Dec 2007 15:25:06 +1100	[thread overview]
Message-ID: <775b8d190712212025v2ee285e9rcc6507000c6289b7@mail.gmail.com> (raw)
In-Reply-To: <d6c1331c41a97e88c9db8a5d54d2a1d8@quanstro.net>

excuse me. that's what hjdicks was for .. and it's called pack. ok.

abuse them or yourselfs for using such code.

brucee

On Dec 22, 2007 11:20 AM, erik quanstrom <quanstro@quanstro.net> wrote:
> > but it doesn't have to be.  this is legit:
> >
> >       typedef struct{
> >               Ehdr;           // 1
> >               Ehdr;           // 2
> >               uchar   op[2];
> >       }Pkt;
>
> my explinations stink.  perhaps this gets at what
> i'm saying better.  the structure S0 won't have
> any padding, yet the two calls to frobehdr are
> just fine.  i'm not sure i see the alignment problem
> that requires padding all unnamed structures.
>
>        typedef struct{
>                uchar   s[6];
>                uchar   d[6];
>                uchar   t[2]
>        }Ehdr;
>
>        frobehdr(Ehdr*)
>
>        typedef struct{
>                uchar   s0[6];
>                uchar   d0[6];
>                uchar   t0[2]
>                uchar   s1[6];
>                uchar   d1[6];
>                uchar   t1[2]
>        }S0;
>
>        void
>        thunk0(void)
>        {
>                S0 *s;
>                frobehdr((Ehdr*)s->s0);
>                frobehdr((Ehdr*)s->s1);
>        }
>
>
> - erik
>


  reply	other threads:[~2007-12-22  4:25 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-21 23:10 erik quanstrom
2007-12-21 23:24 ` Martin Neubauer
2007-12-22  0:00   ` erik quanstrom
2007-12-21 23:48 ` Skip Tavakkolian
2007-12-21 23:52   ` erik quanstrom
2007-12-21 23:59     ` Skip Tavakkolian
2007-12-22  0:20       ` erik quanstrom
2007-12-22  4:25         ` Bruce Ellis [this message]
2007-12-22  4:34           ` erik quanstrom
2007-12-22  4:41             ` Bruce Ellis
2007-12-22 11:09   ` C H Forsyth

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