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Message-Id: <1548076553-31268-10-git-send-email-jiong.wang@netronome.com> Date: Mon, 21 Jan 2019 08:15:46 -0500 From: Jiong Wang <jiong.wang@...ronome.com> To: ast@...nel.org, daniel@...earbox.net Cc: netdev@...r.kernel.org, oss-drivers@...ronome.com, Jiong Wang <jiong.wang@...ronome.com> Subject: [PATCH bpf-next v2 09/16] x86_64: bpf: implement jitting of JMP32 This patch implements code-gen for new JMP32 instructions on x86_64. Cc: Alexei Starovoitov <ast@...nel.org> Cc: Daniel Borkmann <daniel@...earbox.net> Signed-off-by: Jiong Wang <jiong.wang@...ronome.com> --- arch/x86/net/bpf_jit_comp.c | 46 +++++++++++++++++++++++++++++++++++++++------ 1 file changed, 40 insertions(+), 6 deletions(-) diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 5542303..afabf59 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -881,20 +881,41 @@ xadd: if (is_imm8(insn->off)) case BPF_JMP | BPF_JSLT | BPF_X: case BPF_JMP | BPF_JSGE | BPF_X: case BPF_JMP | BPF_JSLE | BPF_X: + case BPF_JMP32 | BPF_JEQ | BPF_X: + case BPF_JMP32 | BPF_JNE | BPF_X: + case BPF_JMP32 | BPF_JGT | BPF_X: + case BPF_JMP32 | BPF_JLT | BPF_X: + case BPF_JMP32 | BPF_JGE | BPF_X: + case BPF_JMP32 | BPF_JLE | BPF_X: + case BPF_JMP32 | BPF_JSGT | BPF_X: + case BPF_JMP32 | BPF_JSLT | BPF_X: + case BPF_JMP32 | BPF_JSGE | BPF_X: + case BPF_JMP32 | BPF_JSLE | BPF_X: /* cmp dst_reg, src_reg */ - EMIT3(add_2mod(0x48, dst_reg, src_reg), 0x39, - add_2reg(0xC0, dst_reg, src_reg)); + if (BPF_CLASS(insn->code) == BPF_JMP) + EMIT1(add_2mod(0x48, dst_reg, src_reg)); + else if (is_ereg(dst_reg) || is_ereg(src_reg)) + EMIT1(add_2mod(0x40, dst_reg, src_reg)); + EMIT2(0x39, add_2reg(0xC0, dst_reg, src_reg)); goto emit_cond_jmp; case BPF_JMP | BPF_JSET | BPF_X: + case BPF_JMP32 | BPF_JSET | BPF_X: /* test dst_reg, src_reg */ - EMIT3(add_2mod(0x48, dst_reg, src_reg), 0x85, - add_2reg(0xC0, dst_reg, src_reg)); + if (BPF_CLASS(insn->code) == BPF_JMP) + EMIT1(add_2mod(0x48, dst_reg, src_reg)); + else if (is_ereg(dst_reg) || is_ereg(src_reg)) + EMIT1(add_2mod(0x40, dst_reg, src_reg)); + EMIT2(0x85, add_2reg(0xC0, dst_reg, src_reg)); goto emit_cond_jmp; case BPF_JMP | BPF_JSET | BPF_K: + case BPF_JMP32 | BPF_JSET | BPF_K: /* test dst_reg, imm32 */ - EMIT1(add_1mod(0x48, dst_reg)); + if (BPF_CLASS(insn->code) == BPF_JMP) + EMIT1(add_1mod(0x48, dst_reg)); + else if (is_ereg(dst_reg)) + EMIT1(add_1mod(0x40, dst_reg)); EMIT2_off32(0xF7, add_1reg(0xC0, dst_reg), imm32); goto emit_cond_jmp; @@ -908,8 +929,21 @@ xadd: if (is_imm8(insn->off)) case BPF_JMP | BPF_JSLT | BPF_K: case BPF_JMP | BPF_JSGE | BPF_K: case BPF_JMP | BPF_JSLE | BPF_K: + case BPF_JMP32 | BPF_JEQ | BPF_K: + case BPF_JMP32 | BPF_JNE | BPF_K: + case BPF_JMP32 | BPF_JGT | BPF_K: + case BPF_JMP32 | BPF_JLT | BPF_K: + case BPF_JMP32 | BPF_JGE | BPF_K: + case BPF_JMP32 | BPF_JLE | BPF_K: + case BPF_JMP32 | BPF_JSGT | BPF_K: + case BPF_JMP32 | BPF_JSLT | BPF_K: + case BPF_JMP32 | BPF_JSGE | BPF_K: + case BPF_JMP32 | BPF_JSLE | BPF_K: /* cmp dst_reg, imm8/32 */ - EMIT1(add_1mod(0x48, dst_reg)); + if (BPF_CLASS(insn->code) == BPF_JMP) + EMIT1(add_1mod(0x48, dst_reg)); + else if (is_ereg(dst_reg)) + EMIT1(add_1mod(0x40, dst_reg)); if (is_imm8(imm32)) EMIT3(0x83, add_1reg(0xF8, dst_reg), imm32); -- 2.7.4
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