[PATCH] bpf, powerpc: fix jit for seccomp_data access

[Mark Lord]

On 18-02-21 03:35 AM, Naveen N. Rao wrote:
> Mark Lord wrote:
>> I am using SECCOMP to filter syscalls on a ppc32 platform,
>> and noticed that the JIT compiler was failing on the BPF
>> even though the interpreter was working fine.
>>
>> The issue was that the compiler was missing one of the instructions
>> used by SECCOMP, so here is a patch to enable JIT for that instruction.
>>
>> Signed-Off-By:  Mark Lord <mlord at pobox.com>
>>
>> --- old/arch/powerpc/net/bpf_jit_comp.c 2018-02-16 14:07:01.000000000 -0500
>> +++ linux/arch/powerpc/net/bpf_jit_comp.c       2018-02-20 14:41:20.805227494 -0500
>> @@ -329,6 +329,9 @@ static int bpf_jit_build_body(struct bpf
>>                         BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, len) != 4);
>>                         PPC_LWZ_OFFS(r_A, r_skb, offsetof(struct sk_buff, len));
>>                         break;
>> +               case BPF_LDX | BPF_W | BPF_ABS: /* A = *((u32 *)(seccomp_data + K)); */
>> +                       PPC_LWZ_OFFS(r_A, r_skb, K);
>> +                       break;
> 
> Looks good to me, but I am not able to apply this patch. There seems to be whitespace damage.

Here (attached) is a clean copy.

-- 
Mark Lord
Real-Time Remedies Inc.
mlord at pobox.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ppc-jit.patch
Type: text/x-patch
Size: 591 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20180221/39d867e4/attachment.bin>