From 4bfaddf15bac7afa7048d105864dab65c5d1f9e7 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 4 Jun 2012 21:26:30 +0000 Subject: x86 bpf_jit: support BPF_S_ANC_ALU_XOR_X instruction commit ffe06c17afbb (filter: add XOR operation) added generic support for XOR operation. This patch implements the XOR instruction in x86 jit. Signed-off-by: Eric Dumazet Cc: Jiri Pirko Signed-off-by: David S. Miller --- arch/x86/net/bpf_jit_comp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 0597f95b6da6..33643a8bcbbb 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -309,6 +309,10 @@ void bpf_jit_compile(struct sk_filter *fp) else EMIT1_off32(0x0d, K); /* or imm32,%eax */ break; + case BPF_S_ANC_ALU_XOR_X: /* A ^= X; */ + seen |= SEEN_XREG; + EMIT2(0x31, 0xd8); /* xor %ebx,%eax */ + break; case BPF_S_ALU_LSH_X: /* A <<= X; */ seen |= SEEN_XREG; EMIT4(0x89, 0xd9, 0xd3, 0xe0); /* mov %ebx,%ecx; shl %cl,%eax */ -- cgit v1.2.3