[PATCH 3/8] add mem64_min/max control

H. Peter Anvin hpa at zytor.com
Sun Nov 18 01:23:16 EST 2012

I think you just need one of the PIC models, or the medium model.

ebiederm at xmission.com wrote:

>Yinghai Lu <yinghai at kernel.org> writes:
>> On Sat, Nov 17, 2012 at 8:47 PM, Eric W. Biederman
>> <ebiederm at xmission.com> wrote:
>>> "H. Peter Anvin" <hpa at zytor.com> writes:
>>> 64bit purgatory coming from kexec should be running with a page
>>> that identity maps everything loaded by kexec and in practice all of
>>> memory.
>> there is lots of R_X86_64_32 and R_X86_64_32S for 64bit purgatory.
>> those come from global variables...could kill some by converting them
>> but still have some global string or ro data....
>> build one big file include all .S ?
>For R_x86_64_32 and R_x86_64_32S the problem is that the instructions
>are using absolute 32bit addresses.
>It is probably overkill but we should be able to solve this with
>by adding "-mcmodel=large" to the build of purgatory.
>Hopefully there are not 32bit or 16bit assembly routines getting linked
>in and using problemenatic instructions.

Sent from my mobile phone. Please excuse brevity and lack of formatting.

More information about the kexec mailing list