From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
<konrad.wilk@oracle.com>, <david.vrabel@citrix.com>
Cc: <andrew.cooper3@citrix.com>, <linux-kernel@vger.kernel.org>,
<mcgrof@kernel.org>, <brgerst@gmail.com>,
<xen-devel@lists.xenproject.org>
Subject: Re: [Xen-devel] [PATCH v3 0/2] Clear .bss for VP guests
Date: Fri, 26 Feb 2016 11:53:30 +0100 [thread overview]
Message-ID: <56D02EAA.4090200@citrix.com> (raw)
In-Reply-To: <1456413395-7679-1-git-send-email-boris.ostrovsky@oracle.com>
El 25/2/16 a les 16:16, Boris Ostrovsky ha escrit:
> PV guests need to have their .bss zeroed out since it is not guaranteed
> to be cleared by Xen's domain builder
I guess I'm missing something, but elf_load_image (in libelf-loader.c)
seems to be able to clear segments (it will zero the memory between
p_paddr + p_filesz and p_paddr + p_memsz) while loading the ELF into
memory, so if the program headers are correctly setup the .bss should be
zeroed out AFAICT.
Roger.
next prev parent reply other threads:[~2016-02-26 10:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 15:16 [PATCH v3 0/2] Clear .bss for VP guests Boris Ostrovsky
2016-02-25 15:16 ` [PATCH v3 1/2] xen/x86: Zero out .bss for PV guests Boris Ostrovsky
2016-02-25 16:12 ` Brian Gerst
2016-02-25 15:16 ` [PATCH v3 2/2] xen/x86: Drop mode-selecting ifdefs in startup_xen() Boris Ostrovsky
2016-02-26 10:53 ` Roger Pau Monné [this message]
2016-02-26 13:51 ` [Xen-devel] [PATCH v3 0/2] Clear .bss for VP guests Boris Ostrovsky
2016-02-26 14:42 ` Brian Gerst
2016-02-26 15:10 ` Boris Ostrovsky
2016-02-26 15:12 ` David Vrabel
2016-02-26 15:22 ` Roger Pau Monné
2016-02-26 15:26 ` David Vrabel
2016-02-26 15:38 ` Boris Ostrovsky
2016-02-26 15:30 ` Boris Ostrovsky
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