From: Nicolas Schichan <nschichan@freebox.fr>
Date: Mon, 27 Jul 2015 13:06:50 +0000 (+0200)
Subject: ARM: net: add support for BPF_ANC | SKF_AD_PAY_OFFSET in ARM JIT.
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=303249ab168f58ee52c502389b9a8046af78d142;p=openwrt%2Fstaging%2Fblogic.git

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 6ff248ca36d9..3c73caf6e09b 100644
--- 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.