Re: [PATCH v10 15/17] kernel: add support for .init_array.* constructors

[Andrey Ryabinin]

On 01/30/2015 02:13 AM, Andrew Morton wrote:
> On Thu, 29 Jan 2015 18:11:59 +0300 Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> wrote:
> 
>> KASan uses constructors for initializing redzones for global
>> variables. Actually KASan doesn't need priorities for constructors,
>> so they were removed from GCC 5.0, but GCC 4.9.2 still generates
>> constructors with priorities.
> 
> I don't understand this changelog either.  What's wrong with priorities
> and what is the patch doing about it?  More details, please.
> 

Currently kernel ignore constructors with priorities (e.g. .init_array.00099).
Kernel understand only constructors with default priority ( .init_array ).

This patch adds support for constructors with priorities.

For kernel image we put pointers to constructors between __ctors_start/__ctors_end
and do_ctors() will call them.

For modules  - .init_array.* sections merged into .init_array section.
Module code properly handles constructors in .init_array section.


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