Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 73ae3c04 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by Alexei Starovoitov
Browse files

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: default avatarDaniel Borkmann <daniel@iogearbox.net>
Cc: Shubham Bansal <illusionist.neo@gmail.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent e472d5d8

arch/arm/net/bpf_jit_32.c

+0 −8
Original line number Diff line number Diff line
@@ -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)