Re: [PATCH v5] MIPS: Truncate link address into 32bit for 32bit kernel

[Nathan Chancellor]

On Wed, Apr 22, 2020 at 10:32:54PM +0800, Jiaxun Yang wrote:
> LLD failed to link vmlinux with 64bit load address for 32bit ELF
> while bfd will strip 64bit address into 32bit silently.
> To fix LLD build, we should truncate load address provided by platform
> into 32bit for 32bit kernel.
> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
> Link: https://github.com/ClangBuiltLinux/linux/issues/786
> Link: https://sourceware.org/bugzilla/show_bug.cgi?id=25784
> Reviewed-by: Maciej W. Rozycki <macro@xxxxxxxxxxxxxx>
> Reviewed-by: Fangrui Song <maskray@xxxxxxxxxx>
> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Nathan Chancellor <natechancellor@xxxxxxxxx>
> --
> V2: Take MaskRay's shell magic.
> 
> V3: After spent an hour on dealing with special character issue in
> Makefile, I gave up to do shell hacks and write a util in C instead.
> Thanks Maciej for pointing out Makefile variable problem.
> 
> v4: Finally we managed to find a Makefile method to do it properly
> thanks to Kees. As it's too far from the initial version, I removed
> Review & Test tag from Nick and Fangrui and Cc instead.
> 
> v5: Care vmlinuz as well.

Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx>