Messages in this thread | | | From | "chenzefeng (A)" <> | Subject | 答复: [PATCH] x86: livepatch: Treat R X86 64 PLT32 as R X86 64 PC32 | Date | Fri, 15 Feb 2019 08:17:36 +0000 |
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HI, Jiri Kosina,
On Fri, 15 Feb 2019, Jiri Kosina wrote: >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@huawei.com>
>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.
The patch is based on kernel version Linux 4.4.174.
Thanks. chenzefeng
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