From: "Stephen C. Tweedie" <sct@redhat.com>
To: pnilesh@in.ibm.com
Cc: linux-mm@kvack.org, Stephen Tweedie <sct@redhat.com>
Subject: Re: Why ?
Date: Mon, 27 Mar 2000 11:46:11 +0100 [thread overview]
Message-ID: <20000327114611.H1160@redhat.com> (raw)
In-Reply-To: <CA2568AF.002D39AF.00@d73mta05.au.ibm.com>; from pnilesh@in.ibm.com on Mon, Mar 27, 2000 at 01:36:19PM +0530
Hi,
On Mon, Mar 27, 2000 at 01:36:19PM +0530, pnilesh@in.ibm.com wrote:
> Why the first 0x0 - 0x07ffffff virtual addresses are not used by any
> process ?
> Is that used by the kernel and if yes for what ?
No, the entire 3GB user virtual address space is usable by user space.
It's the compiler/linker toolset which requests that ELF binaries be
loaded at 0x08000000. As for a reason, the only one I'm aware of is
that that's what the ELF standard says. :-) It does offer a solid
protection against dereferencing uninitialised pointers, though.
--Stephen
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next prev parent reply other threads:[~2000-03-27 10:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-27 8:06 Why ? pnilesh
2000-03-27 10:46 ` Stephen C. Tweedie [this message]
2000-03-27 16:59 ` Benjamin C.R. LaHaise
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