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Commit 1fb5c9c6 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by Alexei Starovoitov
Browse files

bpf, mips64: 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 mips64 JIT.

Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Cc: David Daney <david.daney@cavium.com>
Reviewed-by: default avatarDavid Daney <david.daney@cavium.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 740d52c6

arch/mips/net/ebpf_jit.c

+0 −10
Original line number Diff line number Diff line
@@ -860,11 +860,6 @@ static int build_one_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, 
			break;

		case BPF_DIV:

		case BPF_MOD:

			b_off = b_imm(exit_idx, ctx);

			if (is_bad_offset(b_off))

				return -E2BIG;

			emit_instr(ctx, beq, src, MIPS_R_ZERO, b_off);

			emit_instr(ctx, movz, MIPS_R_V0, MIPS_R_ZERO, src);

			emit_instr(ctx, ddivu, dst, src);

			if (bpf_op == BPF_DIV)

				emit_instr(ctx, mflo, dst);
@@ -943,11 +938,6 @@ static int build_one_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, 
			break;

		case BPF_DIV:

		case BPF_MOD:

			b_off = b_imm(exit_idx, ctx);

			if (is_bad_offset(b_off))

				return -E2BIG;

			emit_instr(ctx, beq, src, MIPS_R_ZERO, b_off);

			emit_instr(ctx, movz, MIPS_R_V0, MIPS_R_ZERO, src);

			emit_instr(ctx, divu, dst, src);

			if (bpf_op == BPF_DIV)

				emit_instr(ctx, mflo, dst);