From: "Russ Cox" <rsc@swtch.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Fresh (relatively speaking) Graphviz
Date: Thu, 6 Mar 2008 12:07:15 -0500 [thread overview]
Message-ID: <20080306170803.647D11E8C51@holo.morphisms.net> (raw)
In-Reply-To: <e1c788fb5b98614ad1a258c9293ff194@proxima.alt.za>
> I'm now getting to the 386 syscalls. The following comment in the
> mkfile needs addressing. Suggestions?
Change the loop to rename the generated assembly
stub __seek and treat it like any other system call
(no special code; just the name change).
Then add this C function:
int _seek(vlong*, int, vlong, int);
vlong
seek(int fd, vlong off, int whence)
{
vlong ret;
if(_seek(&ret, fd, off, whence) == -1)
return -1;
return ret;
}
You should never ask "how do I write this in assembly?"
You should ask "how do I *not* write this in assembly?"
Russ
P. S. You might also change gcc not to prefix all the
C functions with underscores. (I'm sure there's an option.)
Real systems gave that up a long time ago.
prev parent reply other threads:[~2008-03-06 17:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-05 12:26 lucio
2008-03-05 18:00 ` Russ Cox
2008-03-05 18:51 ` P9GCC: APE library (Was: [9fans] Fresh (relatively speaking) Graphviz) lucio
2008-03-05 18:55 ` [9fans] Fresh (relatively speaking) Graphviz lucio
2008-03-05 20:58 ` Russ Cox
2008-03-05 21:07 ` lucio
2008-03-05 21:14 ` Charles Forsyth
2008-03-05 21:23 ` lucio
2008-03-06 4:47 ` lucio
2008-03-06 4:55 ` P9GCC progress (Was: [9fans] Fresh (relatively speaking) Graphviz) lucio
2008-03-06 17:07 ` Russ Cox [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080306170803.647D11E8C51@holo.morphisms.net \
--to=rsc@swtch.com \
--cc=9fans@cse.psu.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).