Date: Tue, 01 Sep 1998 18:21:27 -0700 From: John Polstra <jdp@polstra.com> To: Mike Smith <mike@smith.net.au> Cc: "Andrew Reilly" <reilly@zeta.org.au>, current@FreeBSD.ORG Subject: Re: ELF binaries size Message-ID: <199809020121.SAA16677@austin.polstra.com> In-Reply-To: Your message of "Tue, 01 Sep 1998 18:15:32 -0000." <199809011815.SAA02451@dingo.cdrom.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> > Does that mean that the last page in a text segment is treated > > differently (wrt vm paging) than the rest of the image, or is > > garbage loaded plast the end, along with the last page? Is this a > > security problem? > > No, we map both text and data read-only. No, the text is read-only and the data is copy-on-write. > The bss is still page-aligned. Nope. Not in ELF. It starts somewhere in the middle of the last data page. See my earlier posting for the reason why these things aren't a security problem. John -- John Polstra jdp@polstra.com John D. Polstra & Co., Inc. Seattle, Washington USA "Self-knowledge is always bad news." -- John Barth To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199809020121.SAA16677>