Re: [PATCH 6/6] x86: kaslr: relocate base offset at boot

From: Yinghai Lu
Date: Mon Apr 15 2013 - 18:38:24 EST


On Mon, Apr 15, 2013 at 3:07 PM, Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> On Mon, Apr 15, 2013 at 3:00 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
>> also do not overlap with boot_param, command_line, and initrd.
>>
>> and need to double check setup_header.init_size to make sure bss and
>> etc will not
>> fall into memory hole or reserved area in e820.
>>
>> also may need to setup page table for target position as bootloader may only
>> has ident mapping only for loaded bzImage 64 areas.
>>
>> looks you are trying redo the work for bootloader to pick loaded phys addr.
>
> aslr.S's select_aslr_address uses z_extract_offset as the upper bound.
>

so the decompressed image is not moved high?
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