Re: [Xen-devel] [PATCH 09/10] x86: check kexec relocation code fits in a page

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 25/06/13 20:00, Daniel Kiper wrote:
> On Mon, Jun 24, 2013 at 06:42:20PM +0100, David Vrabel wrote:
>> From: David Vrabel <david.vrabel@xxxxxxxxxx>
>>
>> The kexec relocation (control) code must fit in a single page so add a
>> link time check for this.
>>
>> Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
>> ---
>>  xen/arch/x86/xen.lds.S |    4 ++++
>>  1 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
>> index d959941..eebed01 100644
>> --- a/xen/arch/x86/xen.lds.S
>> +++ b/xen/arch/x86/xen.lds.S
>> @@ -186,3 +186,7 @@ SECTIONS
>>    .stab.indexstr 0 : { *(.stab.indexstr) }
>>    .comment 0 : { *(.comment) }
>>  }
>> +
>> +#ifdef CONFIG_KEXEC
>> +ASSERT(__kexec_reloc_size <= PAGE_SIZE, "kexec control code is too large")
> 
> ASSERT(kexec_reloc_size <= KEXEC_CONTROL_PAGE_SIZE, "kexec control code is 
> too large")

Huh. I thought I'd removed KEXEC_CONTROL_PAGE_SIZE but I see the #define
is still there.

David

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