Commit a3212b8f authored by Daniel Borkmann's avatar Daniel Borkmann Committed by Alexei Starovoitov
Browse files

bpf, s390x: remove obsolete exception handling from div/mod



Since we've changed div/mod exception handling for src_reg in
eBPF verifier itself, remove the leftovers from s390x JIT.
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 96a71005
......@@ -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 */
......
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