linux-kernel - Re: [PATCH 7/8] x86/xen: Add unwind hint annotations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 12 Sep 2017 10:39:26 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Jiri Slaby <jslaby@...e.cz>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH 7/8] x86/xen: Add unwind hint annotations

On Tue, Sep 12, 2017 at 02:56:52PM +0200, Jiri Slaby wrote:
> On 08/31/2017, 10:23 PM, Josh Poimboeuf wrote:
> > Add unwind hint annotations to the xen head code so the ORC unwinder can
> > read head_64.o.
> 
> xen-head.S is included also in head_32.S, so we see:
> arch/x86/kernel/../../x86/xen/xen-head.S:47: Error: no such instruction:
> `unwind_hint_empty'
> scripts/Makefile.build:413: recipe for target
> 'arch/x86/kernel/head_32.o' failed
> 
> To fix this, I use:
> 
> --- a/arch/x86/kernel/head_32.S
> +++ b/arch/x86/kernel/head_32.S
> @@ -25,6 +25,7 @@
>  #include <asm/bootparam.h>
>  #include <asm/export.h>
>  #include <asm/pgtable_32.h>
> +#include "../entry/calling.h"
> 
>  /* Physical address */
>  #define pa(X) ((X) - __PAGE_OFFSET)

Thanks.  0-day reported this as well.  Will fix this in v2.

-- 
Josh