From 73ae3c0426f01295ef307caf9531c0453b8f2728 Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Fri, 26 Jan 2018 23:33:47 +0100 Subject: [PATCH] bpf, arm: 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 arm32 JIT. Signed-off-by: Daniel Borkmann Cc: Shubham Bansal Signed-off-by: Alexei Starovoitov --- arch/arm/net/bpf_jit_32.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c index 41e2feb0cf4f..b5030e1a41d8 100644 --- a/arch/arm/net/bpf_jit_32.c +++ b/arch/arm/net/bpf_jit_32.c @@ -363,15 +363,7 @@ static inline int epilogue_offset(const struct jit_ctx *ctx) static inline void emit_udivmod(u8 rd, u8 rm, u8 rn, struct jit_ctx *ctx, u8 op) { const u8 *tmp = bpf2a32[TMP_REG_1]; - s32 jmp_offset; - /* checks if divisor is zero or not. If it is, then - * exit directly. - */ - emit(ARM_CMP_I(rn, 0), ctx); - _emit(ARM_COND_EQ, ARM_MOV_I(ARM_R0, 0), ctx); - jmp_offset = epilogue_offset(ctx); - _emit(ARM_COND_EQ, ARM_B(jmp_offset), ctx); #if __LINUX_ARM_ARCH__ == 7 if (elf_hwcap & HWCAP_IDIVA) { if (op == BPF_DIV)