ARM: net: add support for BPF_ANC | SKF_AD_PAY_OFFSET in ARM JIT.

Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index 6ff248c..3c73caf 100644 (file)
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -915,6 +915,14 @@ b_epilogue:
                        off = offsetof(struct sk_buff, queue_mapping);
                        emit(ARM_LDRH_I(r_A, r_skb, off), ctx);
                        break;
+               case BPF_ANC | SKF_AD_PAY_OFFSET:
+                       ctx->seen |= SEEN_SKB | SEEN_CALL;
+
+                       emit(ARM_MOV_R(ARM_R0, r_skb), ctx);
+                       emit_mov_i(ARM_R3, (unsigned int)skb_get_poff, ctx);
+                       emit_blx_r(ARM_R3, ctx);
+                       emit(ARM_MOV_R(r_A, ARM_R0), ctx);
+                       break;
                case BPF_LDX | BPF_W | BPF_ABS:
                        /*
                         * load a 32bit word from struct seccomp_data.