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authorDaniel Borkmann <daniel@iogearbox.net>2018-01-27 01:33:41 +0300
committerAlexei Starovoitov <ast@kernel.org>2018-01-27 03:42:06 +0300
commit96a71005bdcbbcf01abe50e2965bbcd1aee6a1e5 (patch)
tree6d8b659a1a9cb84754930d3af492c3a285ae065b /arch/arm64/net
parent3e5b1a39d7cfaa3c023c17f5d12b3f22af046929 (diff)
downloadlinux-96a71005bdcbbcf01abe50e2965bbcd1aee6a1e5.tar.xz
bpf, arm64: 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 arm64 JIT. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/arm64/net')
-rw-r--r--arch/arm64/net/bpf_jit_comp.c13
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 0775d5ab8ee9..1d4f1da7c58f 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -390,18 +390,6 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
case BPF_ALU64 | BPF_DIV | BPF_X:
case BPF_ALU | BPF_MOD | BPF_X:
case BPF_ALU64 | BPF_MOD | BPF_X:
- {
- const u8 r0 = bpf2a64[BPF_REG_0];
-
- /* if (src == 0) return 0 */
- jmp_offset = 3; /* skip ahead to else path */
- check_imm19(jmp_offset);
- emit(A64_CBNZ(is64, src, jmp_offset), ctx);
- emit(A64_MOVZ(1, r0, 0, 0), ctx);
- jmp_offset = epilogue_offset(ctx);
- check_imm26(jmp_offset);
- emit(A64_B(jmp_offset), ctx);
- /* else */
switch (BPF_OP(code)) {
case BPF_DIV:
emit(A64_UDIV(is64, dst, dst, src), ctx);
@@ -413,7 +401,6 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
break;
}
break;
- }
case BPF_ALU | BPF_LSH | BPF_X:
case BPF_ALU64 | BPF_LSH | BPF_X:
emit(A64_LSLV(is64, dst, dst, src), ctx);