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Commit 32472745 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
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s390/bpf,jit: add support MOD instruction 



Add support for MOD operation for s390's JIT.

Same as 280050cc "x86 bpf_jit: support MOD operation" for x86 which
adds JIT support for the generic new MOD operation introduced with
b6069a95 "filter: add MOD operation".

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent d99e79ec

arch/s390/net/bpf_jit_comp.c

+21 −0
Original line number Diff line number Diff line
@@ -341,6 +341,27 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct sock_filter *filter, 
		/* lr %r5,%r4 */

		EMIT2(0x1854);

		break;

	case BPF_S_ALU_MOD_X: /* A %= X */

		jit->seen |= SEEN_XREG | SEEN_RET0;

		/* ltr %r12,%r12 */

		EMIT2(0x12cc);

		/* jz <ret0> */

		EMIT4_PCREL(0xa7840000, (jit->ret0_ip - jit->prg));

		/* lhi %r4,0 */

		EMIT4(0xa7480000);

		/* dr %r4,%r12 */

		EMIT2(0x1d4c);

		/* lr %r5,%r4 */

		EMIT2(0x1854);

		break;

	case BPF_S_ALU_MOD_K: /* A %= K */

		/* lhi %r4,0 */

		EMIT4(0xa7480000);

		/* d %r4,<d(K)>(%r13) */

		EMIT4_DISP(0x5d40d000, EMIT_CONST(K));

		/* lr %r5,%r4 */

		EMIT2(0x1854);

		break;

	case BPF_S_ALU_AND_X: /* A &= X */

		jit->seen |= SEEN_XREG;

		/* nr %r5,%r12 */