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Commit 2bea29b7 authored by Mircea Gherzan's avatar Mircea Gherzan Committed by Russell King
Browse files

ARM: 7421/1: bpf_jit: BPF_S_ANC_ALU_XOR_X support 



JIT support for the XOR operation introduced by the commit
ffe06c17.

Signed-off-by: default avatarMircea Gherzan <mgherzan@gmail.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 2307574a

arch/arm/net/bpf_jit_32.c

+5 −0
Original line number Diff line number Diff line
@@ -762,6 +762,11 @@ static int build_body(struct jit_ctx *ctx) 
			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;

arch/arm/net/bpf_jit_32.h

+4 −0
Original line number Diff line number Diff line
@@ -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 \