ARM: net: add JIT support for loads from struct seccomp_data.

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 e1268f90502682c75dfd7a98e6ed15272ea8d512..b5f470ddab6d73acddfe7101791e9ec5ce5ebe5e 100644 (file)
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -852,6 +852,16 @@ b_epilogue:
                        off = offsetof(struct sk_buff, queue_mapping);
                        emit(ARM_LDRH_I(r_A, r_skb, off), ctx);
                        break;
+               case BPF_LDX | BPF_W | BPF_ABS:
+                       /*
+                        * load a 32bit word from struct seccomp_data.
+                        * seccomp_check_filter() will already have checked
+                        * that k is 32bit aligned and lies within the
+                        * struct seccomp_data.
+                        */
+                       ctx->seen |= SEEN_SKB;
+                       emit(ARM_LDR_I(r_A, r_skb, k), ctx);
+                       break;
                default:
                        return -1;
                }