This patch implements code-gen for BPF_ALU | BPF_ARSH | BPF_*.
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Signed-off-by: Jiong Wang <[email protected]>
---
arch/s390/net/bpf_jit_comp.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index d7052cb..3ff758e 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -821,10 +821,22 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit,
struct bpf_prog *fp, int i
/*
* BPF_ARSH
*/
+ case BPF_ALU | BPF_ARSH | BPF_X: /* ((s32) dst) >>= src */
+ /* sra %dst,%dst,0(%src) */
+ EMIT4_DISP(0x8a000000, dst_reg, src_reg, 0);
+ EMIT_ZERO(dst_reg);
+ break;
case BPF_ALU64 | BPF_ARSH | BPF_X: /* ((s64) dst) >>= src */
/* srag %dst,%dst,0(%src) */
EMIT6_DISP_LH(0xeb000000, 0x000a, dst_reg, dst_reg, src_reg, 0);
break;
+ case BPF_ALU | BPF_ARSH | BPF_K: /* ((s32) dst >> imm */
+ if (imm == 0)
+ break;
+ /* sra %dst,imm(%r0) */
+ EMIT4_DISP(0x8a000000, dst_reg, REG_0, imm);
+ EMIT_ZERO(dst_reg);
+ break;
case BPF_ALU64 | BPF_ARSH | BPF_K: /* ((s64) dst) >>= imm */
if (imm == 0)
break;
--
2.7.4
