On Tue, 2018-02-20 at 19:49:20 UTC, 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 <ml...@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; > case BPF_LDX | BPF_W | BPF_LEN: /* X = skb->len; */ > PPC_LWZ_OFFS(r_X, r_skb, offsetof(struct sk_buff, > len)); > break;
Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/083b20907185b076f21c265b30fe5b cheers
