From: Mircea Gherzan <mgherzan@gmail.com>
To: linux@arm.linux.org.uk
Cc: mgherzan@gmail.com, netdev@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, davem@davemloft.net
Subject: [PATCH] ARM: bpf_jit: BPF_S_ANC_ALU_XOR_X support
Date: Thu, 7 Jun 2012 17:40:18 +0200 [thread overview]
Message-ID: <1339083618-15009-1-git-send-email-mgherzan@gmail.com> (raw)
JIT support for the XOR operation introduced by the commit
ffe06c17afbb.
Signed-off-by: Mircea Gherzan <mgherzan@gmail.com>
---
arch/arm/net/bpf_jit_32.c | 5 +++++
arch/arm/net/bpf_jit_32.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index 62135849..c641fb6 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -762,6 +762,11 @@ b_epilogue:
update_on_xread(ctx);
emit(ARM_MOV_R(r_A, r_X), ctx);
break;
+ case BPF_S_ANC_ALU_XOR_X:
+ /* A ^= X */
+ update_on_xread(ctx);
+ emit(ARM_EOR_R(r_A, r_A, r_X), ctx);
+ break;
case BPF_S_ANC_PROTOCOL:
/* A = ntohs(skb->protocol) */
ctx->seen |= SEEN_SKB;
diff --git a/arch/arm/net/bpf_jit_32.h b/arch/arm/net/bpf_jit_32.h
index 99ae5e3..7fa2f7d 100644
--- a/arch/arm/net/bpf_jit_32.h
+++ b/arch/arm/net/bpf_jit_32.h
@@ -68,6 +68,8 @@
#define ARM_INST_CMP_R 0x01500000
#define ARM_INST_CMP_I 0x03500000
+#define ARM_INST_EOR_R 0x00200000
+
#define ARM_INST_LDRB_I 0x05d00000
#define ARM_INST_LDRB_R 0x07d00000
#define ARM_INST_LDRH_I 0x01d000b0
@@ -132,6 +134,8 @@
#define ARM_CMP_R(rn, rm) _AL3_R(ARM_INST_CMP, 0, rn, rm)
#define ARM_CMP_I(rn, imm) _AL3_I(ARM_INST_CMP, 0, rn, imm)
+#define ARM_EOR_R(rd, rn, rm) _AL3_R(ARM_INST_EOR, rd, rn, rm)
+
#define ARM_LDR_I(rt, rn, off) (ARM_INST_LDR_I | (rt) << 12 | (rn) << 16 \
| (off))
#define ARM_LDRB_I(rt, rn, off) (ARM_INST_LDRB_I | (rt) << 12 | (rn) << 16 \
--
1.7.10
reply other threads:[~2012-06-07 15:41 UTC|newest]
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