Re: [Xen-devel] [PATCH v2 3/5] xen/livepatch/ARM32: Don't load and crash on livepatches loaded with wrong alignment.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 18.09.17 at 21:37, <konrad.wilk@xxxxxxxxxx> wrote:
> On Tue, Sep 12, 2017 at 02:57:04AM -0600, Jan Beulich wrote:
>> >>> On 12.09.17 at 02:22, <konrad@xxxxxxxxxx> wrote:
>> > If I compile the test-case under ARM32 it works OK (as the
>> > .livepatch.depends ends up being aligned to four bytes).
>> 
>> So why is that? What entity is creating this section (or the
>> directive(s) to create it)?
> 
> gcc
> 
> Looking at the xen_bye_world.o produced by cross-compiler:
> 
> xen_bye_world.o:     file format elf32-littlearm
> 
> Contents of section .rodata:
>  0000 78656e5f 65787472 615f7665 7273696f  xen_extra_versio
>  0010 6e00                                 n. 
> 
> And native:
> 
> xen_bye_world.o:     file format elf32-littlearm
> 
> Contents of section .rodata:
>  0000 78656e5f 65787472 615f7665 7273696f  xen_extra_versio
>  0010 6e000000                             n...      

This may rather be a gas than a gcc behavioral difference. What's
the alignment of .rodata in both cases?

Jan


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