bpf, arm64: remove obsolete exception handling from div/mod (96a71005) · Commits · 戴 / test

Since we've changed div/mod exception handling for src_reg in eBPF verifier itself, remove the leftovers from arm64 JIT. Signed-off-by:

arch/arm64/net/bpf_jit_comp.c

+0 −13

Original line number	Diff line number	Diff line
		@@ -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);