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authorEric Dumazet <edumazet@google.com>2012-06-04 23:26:30 +0200
committerDavid S. Miller <davem@davemloft.net>2012-06-06 18:42:44 +0200
commit4bfaddf15bac7afa7048d105864dab65c5d1f9e7 (patch)
treee545e7e21fc521c7f81230476747b32557f7be73 /arch/x86/net
parentdrivers: net: Remove casts to same type (diff)
downloadlinux-4bfaddf15bac7afa7048d105864dab65c5d1f9e7.tar.xz
linux-4bfaddf15bac7afa7048d105864dab65c5d1f9e7.zip
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 <edumazet@google.com> Cc: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/x86/net')
-rw-r--r--arch/x86/net/bpf_jit_comp.c4
1 files changed, 4 insertions, 0 deletions
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 */