diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 106c578..520d2bd 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -335,9 +335,18 @@ void bpf_jit_compile(struct sk_filter *fp) EMIT1_off32(0x0d, K); /* or imm32,%eax */ break; case BPF_S_ANC_ALU_XOR_X: /* A ^= X; */ + case BPF_S_ALU_XOR_X: seen |= SEEN_XREG; EMIT2(0x31, 0xd8); /* xor %ebx,%eax */ break; + case BPF_S_ALU_XOR_K: /* A ^= K; */ + if (K == 0) + break; + if (is_imm8(K)) + EMIT3(0x83, 0xf0, K); /* xor imm8,%eax */ + else + EMIT1_off32(0x35, K); /* xor imm32,%eax */ + break; case BPF_S_ALU_LSH_X: /* A <<= X; */ seen |= SEEN_XREG; EMIT4(0x89, 0xd9, 0xd3, 0xe0); /* mov %ebx,%ecx; shl %cl,%eax */ |