From: Anton Blanchard <anton@samba.org>
To: Chris Friesen <cfriesen@nortel.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: what is ~1MB of memory allocated at fffea000-fffff000 on ppc64?
Date: Mon, 27 Aug 2007 18:19:56 -0500 [thread overview]
Message-ID: <20070827231956.GA5149@kryten> (raw)
In-Reply-To: <46D34A9E.7010501@nortel.com>
Hi,
> For some background, we're running an emulator that uses a null pointer
> value of 0xffff0000 and we want any accesses to that address to trap.
Weird :)
> Do you anticipate any issues with the following change?
>
> -#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
> +#define TASK_SIZE_USER32 (0x00000000FFFF0000UL - (1*PAGE_SIZE))
Should be OK, for a 64kB kernel we will put the stack top at 0xFFFF0000
anyway.
Anton
next prev parent reply other threads:[~2007-08-27 23:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-27 20:22 what is ~1MB of memory allocated at fffea000-fffff000 on ppc64? Chris Friesen
2007-08-27 20:31 ` Anton Blanchard
2007-08-27 22:05 ` Chris Friesen
2007-08-27 23:19 ` Anton Blanchard [this message]
2007-08-28 5:19 ` Paul Mackerras
2007-08-28 15:15 ` Chris Friesen
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=20070827231956.GA5149@kryten \
--to=anton@samba.org \
--cc=cfriesen@nortel.com \
--cc=linuxppc-dev@ozlabs.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.