Re: [PATCH] x86: livepatch: Treat R_X86_64_PLT32 as R_X86_64_PC32

[Jiri Kosina]

On Fri, 15 Feb 2019, chenzefeng (A) wrote:

> On x86-64, for 32-bit PC-relacive branches, we can generate PLT32 
> relocation, instead of PC32 relocation. and R_X86_64_PLT32 can be 
> treated the same as R_X86_64_PC32 since linux kernel doesn't use PLT.
> 
> In linux 4.4 commit b21ebf2fb4cd ("x86: Treat R_X86_64_PLT32 as 
> R_X86_64_PC32") been fixed for the module loading, but not fixed for 
> livepatch relocation, which will fail to load livepatch with the error 
> message as follow: relocation failed for symbol <symbol name> at <symbol 
> address>
> 
> Signed-off-by: chenzefeng <chenzefeng2@xxxxxxxxxx>

What kernel version is this patch based on? We've got rid of x86-specific 
module loading stub and offloaded all the relocation handling to generic 
kmod loader long time ago.

-- 
Jiri Kosina
SUSE Labs