bpf, s390x: remove obsolete exception handling from div/mod (a3212b8f) · Commits · 戴 / test

Since we've changed div/mod exception handling for src_reg in eBPF verifier itself, remove the leftovers from s390x JIT. Signed-off-by:

Daniel Borkmann <daniel@iogearbox.net> Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:

arch/s390/net/bpf_jit_comp.c

+0 −10

Original line number	Diff line number	Diff line
		@@ -610,11 +610,6 @@ static noinline int bpf_jit_insn(struct bpf_jit jit, struct bpf_prog fp, int i
		{
		int rc_reg = BPF_OP(insn->code) == BPF_DIV ? REG_W1 : REG_W0;

		jit->seen \|= SEEN_RET0;
		/* ltr %src,%src (if src == 0 goto fail) */
		EMIT2(0x1200, src_reg, src_reg);
		/* jz <ret0> */
		EMIT4_PCREL(0xa7840000, jit->ret0_ip - jit->prg);
		/* lhi %w0,0 */
		EMIT4_IMM(0xa7080000, REG_W0, 0);
		/* lr %w1,%dst */
		@@ -630,11 +625,6 @@ static noinline int bpf_jit_insn(struct bpf_jit jit, struct bpf_prog fp, int i
		{
		int rc_reg = BPF_OP(insn->code) == BPF_DIV ? REG_W1 : REG_W0;

		jit->seen \|= SEEN_RET0;
		/* ltgr %src,%src (if src == 0 goto fail) */
		EMIT4(0xb9020000, src_reg, src_reg);
		/* jz <ret0> */
		EMIT4_PCREL(0xa7840000, jit->ret0_ip - jit->prg);
		/* lghi %w0,0 */
		EMIT4_IMM(0xa7090000, REG_W0, 0);
		/* lgr %w1,%dst */