s390/bpf,jit: add support MOD instruction (32472745) · Commits · 戴 / test

Add support for MOD operation for s390's JIT. Same as "x86 bpf_jit: support MOD operation" for x86 which adds JIT support for the generic new MOD operation introduced with "filter: add MOD operation". Signed-off-by:

Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:

Martin Schwidefsky <schwidefsky@de.ibm.com>

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 */

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