Commit 4bfaddf1 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

x86 bpf_jit: support BPF_S_ANC_ALU_XOR_X instruction

commit ffe06c17  (filter: add XOR operation) added generic support
for XOR operation.

This patch implements the XOR instruction in x86 jit.
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c2fd03a0
...@@ -309,6 +309,10 @@ void bpf_jit_compile(struct sk_filter *fp) ...@@ -309,6 +309,10 @@ void bpf_jit_compile(struct sk_filter *fp)
else else
EMIT1_off32(0x0d, K); /* or imm32,%eax */ EMIT1_off32(0x0d, K); /* or imm32,%eax */
break; 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; */ case BPF_S_ALU_LSH_X: /* A <<= X; */
seen |= SEEN_XREG; seen |= SEEN_XREG;
EMIT4(0x89, 0xd9, 0xd3, 0xe0); /* mov %ebx,%ecx; shl %cl,%eax */ EMIT4(0x89, 0xd9, 0xd3, 0xe0); /* mov %ebx,%ecx; shl %cl,%eax */
......
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