From: random832@fastmail.com (Random832)
Subject: [TUHS] link() syscall implementation
Date: Sat, 14 Nov 2015 16:18:13 -0500 [thread overview]
Message-ID: <m2bnawqnze.fsf@fastmail.com> (raw)
In-Reply-To: <20151114161757.Horde.RL0PZVub39UDZ9-Qr0wtXdW@avocado.salatschuessel.net>
Oliver Lehmann <lehmann at ans-netz.de> writes:
> ldl rr2,rr8(#4)
> ldl rr4,rr2
> and r4,#32512
> ldl _u+78,rr4
This looks like it could be:
u.u_dirp.l = uap->linkname;
u.u_dirp.left &= 0x7f00;
>
> does the same but with more instructions and of course not 1:1
> binary "the same" ;)
> wonder why
> u.u_dirp.l = (caddr_t)(((long)uap->linkname) & 0x7F00FFFF);
> didn't worked.
Well, what code did it generate? Are longs in the same byte order as
pointers (could it have needed to be FFFF7F00)?
next prev parent reply other threads:[~2015-11-14 21:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-14 12:34 Oliver Lehmann
2015-11-14 12:56 ` Oliver Lehmann
2015-11-14 15:17 ` Oliver Lehmann
2015-11-14 21:18 ` Random832 [this message]
2015-11-14 21:42 ` Oliver Lehmann
2015-11-14 23:07 ` Random832
2015-11-15 14:43 ` Oliver Lehmann
2015-11-14 13:33 ` Random832
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=m2bnawqnze.fsf@fastmail.com \
--to=random832@fastmail.com \
/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).