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Message-Id: <20170425.233820.1357836307906136732.davem@davemloft.net>
Date: Tue, 25 Apr 2017 23:38:20 -0400 (EDT)
From: David Miller <davem@...emloft.net>
To: ast@...com
Cc: netdev@...r.kernel.org
Subject: Re: hmmm...
From: Alexei Starovoitov <ast@...com>
Date: Tue, 25 Apr 2017 19:56:06 -0700
> On 4/25/17 6:52 PM, David Miller wrote:
>>
>> Alexei, I found something strange on my computer :-)
>>
>> [davem@...alhost binutils]$ ./objdump -d x.o
>
> No way! :) I thought it will take weeks!
> Ship it. Ship it. Ship it.
> Cannot wait to pull.
> This is awesome. Thanks a ton!
Relax, it is in a very raw state still. :)
> What is the mnemonic for 32-bit alu ?
It is of the form "xxx32". Here is opcodes table below.
I think there are no formal mnenomics defined anywhere yet right?
So just tell me what adjustments you want to make.
#include "sysdep.h"
#include <stdio.h>
#include "opcode/bpf.h"
#define BPF_OPC_ALU64 0x07
#define BPF_OPC_DW 0x18
#define BPF_OPC_XADD 0xc0
#define BPF_OPC_MOV 0xb0
#define BPF_OPC_ARSH 0xc0
#define BPF_OPC_END 0xd0
#define BPF_OPC_TO_LE 0x00
#define BPF_OPC_TO_BE 0x08
#define BPF_OPC_JNE 0x50
#define BPF_OPC_JSGT 0x60
#define BPF_OPC_JSGE 0x70
#define BPF_OPC_CALL 0x80
#define BPF_OPC_EXIT 0x90
#define BPF_OPC_LD 0x00
#define BPF_OPC_LDX 0x01
#define BPF_OPC_ST 0x02
#define BPF_OPC_STX 0x03
#define BPF_OPC_ALU 0x04
#define BPF_OPC_JMP 0x05
#define BPF_OPC_RET 0x06
#define BPF_OPC_MISC 0x07
#define BPF_OPC_W 0x00
#define BPF_OPC_H 0x08
#define BPF_OPC_B 0x10
#define BPF_OPC_IMM 0x00
#define BPF_OPC_ABS 0x20
#define BPF_OPC_IND 0x40
#define BPF_OPC_MEM 0x60
#define BPF_OPC_LEL 0x80
#define BPF_OPC_MSH 0xa0
#define BPF_OPC_ADD 0x00
#define BPF_OPC_SUB 0x10
#define BPF_OPC_MUL 0x20
#define BPF_OPC_DIV 0x30
#define BPF_OPC_OR 0x40
#define BPF_OPC_AND 0x50
#define BPF_OPC_LSH 0x60
#define BPF_OPC_RSH 0x70
#define BPF_OPC_NEG 0x80
#define BPF_OPC_MOD 0x90
#define BPF_OPC_XOR 0xa0
#define BPF_OPC_JA 0x00
#define BPF_OPC_JEQ 0x10
#define BPF_OPC_JGT 0x20
#define BPF_OPC_JGE 0x30
#define BPF_OPC_JSET 0x40
#define BPF_OPC_K 0x00
#define BPF_OPC_X 0x08
const struct bpf_opcode bpf_opcodes[] = {
{ "mov32", BPF_OPC_ALU | BPF_OPC_MOV | BPF_OPC_X, "1,2" },
{ "mov", BPF_OPC_ALU64 | BPF_OPC_MOV | BPF_OPC_X, "1,2" },
{ "add32", BPF_OPC_ALU | BPF_OPC_ADD | BPF_OPC_X, "1,2" },
{ "add", BPF_OPC_ALU64 | BPF_OPC_ADD | BPF_OPC_X, "1,2" },
{ "sub32", BPF_OPC_ALU | BPF_OPC_SUB | BPF_OPC_X, "1,2" },
{ "sub", BPF_OPC_ALU64 | BPF_OPC_SUB | BPF_OPC_X, "1,2" },
{ "and32", BPF_OPC_ALU | BPF_OPC_AND | BPF_OPC_X, "1,2" },
{ "and", BPF_OPC_ALU64 | BPF_OPC_AND | BPF_OPC_X, "1,2" },
{ "or32", BPF_OPC_ALU | BPF_OPC_OR | BPF_OPC_X, "1,2" },
{ "or", BPF_OPC_ALU64 | BPF_OPC_OR | BPF_OPC_X, "1,2" },
{ "xor32", BPF_OPC_ALU | BPF_OPC_XOR | BPF_OPC_X, "1,2" },
{ "xor", BPF_OPC_ALU64 | BPF_OPC_XOR | BPF_OPC_X, "1,2" },
{ "mul32", BPF_OPC_ALU | BPF_OPC_MUL | BPF_OPC_X, "1,2" },
{ "mul", BPF_OPC_ALU64 | BPF_OPC_MUL | BPF_OPC_X, "1,2" },
{ "div32", BPF_OPC_ALU | BPF_OPC_DIV | BPF_OPC_X, "1,2" },
{ "div", BPF_OPC_ALU64 | BPF_OPC_DIV | BPF_OPC_X, "1,2" },
{ "mod32", BPF_OPC_ALU | BPF_OPC_MOD | BPF_OPC_X, "1,2" },
{ "mod", BPF_OPC_ALU64 | BPF_OPC_MOD | BPF_OPC_X, "1,2" },
{ "lsh32", BPF_OPC_ALU | BPF_OPC_LSH | BPF_OPC_X, "1,2" },
{ "lsh", BPF_OPC_ALU64 | BPF_OPC_LSH | BPF_OPC_X, "1,2" },
{ "rsh32", BPF_OPC_ALU | BPF_OPC_RSH | BPF_OPC_X, "1,2" },
{ "rsh", BPF_OPC_ALU64 | BPF_OPC_RSH | BPF_OPC_X, "1,2" },
{ "arsh32", BPF_OPC_ALU | BPF_OPC_ARSH | BPF_OPC_X, "1,2" },
{ "arsh", BPF_OPC_ALU64 | BPF_OPC_ARSH | BPF_OPC_X, "1,2" },
{ "neg32", BPF_OPC_ALU | BPF_OPC_NEG | BPF_OPC_X, "1" },
{ "neg", BPF_OPC_ALU64 | BPF_OPC_NEG | BPF_OPC_X, "1" },
{ "endbe", BPF_OPC_ALU | BPF_OPC_END | BPF_OPC_TO_BE, "1,i" },
{ "endle", BPF_OPC_ALU | BPF_OPC_END | BPF_OPC_TO_LE, "1,i" },
{ "mov32", BPF_OPC_ALU | BPF_OPC_MOV | BPF_OPC_K, "1,i" },
{ "mov", BPF_OPC_ALU64 | BPF_OPC_MOV | BPF_OPC_K, "1,i" },
{ "add32", BPF_OPC_ALU | BPF_OPC_ADD | BPF_OPC_K, "1,i" },
{ "add", BPF_OPC_ALU64 | BPF_OPC_ADD | BPF_OPC_K, "1,i" },
{ "sub32", BPF_OPC_ALU | BPF_OPC_SUB | BPF_OPC_K, "1,i" },
{ "sub", BPF_OPC_ALU64 | BPF_OPC_SUB | BPF_OPC_K, "1,i" },
{ "and32", BPF_OPC_ALU | BPF_OPC_AND | BPF_OPC_K, "1,i" },
{ "and", BPF_OPC_ALU64 | BPF_OPC_AND | BPF_OPC_K, "1,i" },
{ "or32", BPF_OPC_ALU | BPF_OPC_XOR | BPF_OPC_K, "1,i" },
{ "or", BPF_OPC_ALU64 | BPF_OPC_XOR | BPF_OPC_K, "1,i" },
{ "xor32", BPF_OPC_ALU | BPF_OPC_OR | BPF_OPC_K, "1,i" },
{ "xor", BPF_OPC_ALU64 | BPF_OPC_OR | BPF_OPC_K, "1,i" },
{ "mul32", BPF_OPC_ALU | BPF_OPC_MUL | BPF_OPC_K, "1,i" },
{ "mul", BPF_OPC_ALU64 | BPF_OPC_MUL | BPF_OPC_K, "1,i" },
{ "div32", BPF_OPC_ALU | BPF_OPC_DIV | BPF_OPC_K, "1,i" },
{ "div", BPF_OPC_ALU64 | BPF_OPC_DIV | BPF_OPC_K, "1,i" },
{ "mod32", BPF_OPC_ALU | BPF_OPC_MOD | BPF_OPC_K, "1,i" },
{ "mod", BPF_OPC_ALU64 | BPF_OPC_MOD | BPF_OPC_K, "1,i" },
{ "lsh32", BPF_OPC_ALU | BPF_OPC_LSH | BPF_OPC_K, "1,i" },
{ "lsh", BPF_OPC_ALU64 | BPF_OPC_LSH | BPF_OPC_K, "1,i" },
{ "rsh32", BPF_OPC_ALU | BPF_OPC_RSH | BPF_OPC_K, "1,i" },
{ "rsh", BPF_OPC_ALU64 | BPF_OPC_RSH | BPF_OPC_K, "1,i" },
{ "arsh32", BPF_OPC_ALU | BPF_OPC_ARSH | BPF_OPC_K, "1,i" },
{ "arsh", BPF_OPC_ALU64 | BPF_OPC_ARSH | BPF_OPC_K, "1,i" },
{ "ja", BPF_OPC_JMP | BPF_OPC_JA, "L" },
{ "jeq", BPF_OPC_JMP | BPF_OPC_JEQ | BPF_OPC_X, "1,2,L" },
{ "jgt", BPF_OPC_JMP | BPF_OPC_JGT | BPF_OPC_X, "1,2,L" },
{ "jge", BPF_OPC_JMP | BPF_OPC_JGE | BPF_OPC_X, "1,2,L" },
{ "jne", BPF_OPC_JMP | BPF_OPC_JNE | BPF_OPC_X, "1,2,L" },
{ "jsgt", BPF_OPC_JMP | BPF_OPC_JSGT | BPF_OPC_X, "1,2,L" },
{ "jsge", BPF_OPC_JMP | BPF_OPC_JSGE | BPF_OPC_X, "1,2,L" },
{ "jset", BPF_OPC_JMP | BPF_OPC_JSET | BPF_OPC_X, "1,2,L" },
{ "jeq", BPF_OPC_JMP | BPF_OPC_JEQ | BPF_OPC_K, "1,i,L" },
{ "jgt", BPF_OPC_JMP | BPF_OPC_JGT | BPF_OPC_K, "1,i,L" },
{ "jge", BPF_OPC_JMP | BPF_OPC_JGE | BPF_OPC_K, "1,i,L" },
{ "jne", BPF_OPC_JMP | BPF_OPC_JNE | BPF_OPC_K, "1,i,L" },
{ "jsgt", BPF_OPC_JMP | BPF_OPC_JSGT | BPF_OPC_K, "1,i,L" },
{ "jsge", BPF_OPC_JMP | BPF_OPC_JSGE | BPF_OPC_K, "1,i,L" },
{ "jset", BPF_OPC_JMP | BPF_OPC_JSET | BPF_OPC_K, "1,i,L" },
{ "call", BPF_OPC_JMP | BPF_OPC_CALL, "C" },
{ "tailcall",BPF_OPC_JMP | BPF_OPC_CALL | BPF_OPC_X, "C" },
{ "exit", BPF_OPC_JMP | BPF_OPC_EXIT, "" },
{ "ldimm64", BPF_OPC_LD | BPF_OPC_IMM | BPF_OPC_DW, "1,D" },
{ "ldxw", BPF_OPC_LDX | BPF_OPC_MEM | BPF_OPC_W, "1,[2+O]" },
{ "ldxh", BPF_OPC_LDX | BPF_OPC_MEM | BPF_OPC_H, "1,[2+O]" },
{ "ldxb", BPF_OPC_LDX | BPF_OPC_MEM | BPF_OPC_B, "1,[2+O]" },
{ "ldxdw", BPF_OPC_LDX | BPF_OPC_MEM | BPF_OPC_DW, "1,[2+O]" },
{ "stw", BPF_OPC_ST | BPF_OPC_MEM | BPF_OPC_W, "[1+O],i" },
{ "sth", BPF_OPC_ST | BPF_OPC_MEM | BPF_OPC_H, "[1+O],i" },
{ "stb", BPF_OPC_ST | BPF_OPC_MEM | BPF_OPC_B, "[1+O],i" },
{ "stdw", BPF_OPC_ST | BPF_OPC_MEM | BPF_OPC_DW, "[1+O],i" },
{ "stw", BPF_OPC_STX | BPF_OPC_MEM | BPF_OPC_W, "[1+O],2" },
{ "sth", BPF_OPC_STX | BPF_OPC_MEM | BPF_OPC_H, "[1+O],2" },
{ "stb", BPF_OPC_STX | BPF_OPC_MEM | BPF_OPC_B, "[1+O],2" },
{ "stdw", BPF_OPC_STX | BPF_OPC_MEM | BPF_OPC_DW, "[1+O],2" },
{ "xaddw", BPF_OPC_STX | BPF_OPC_XADD | BPF_OPC_W, "[1+O],2" },
{ "xadddw", BPF_OPC_STX | BPF_OPC_XADD | BPF_OPC_DW, "[1+O],2" },
};
const int bpf_num_opcodes = ((sizeof bpf_opcodes)/(sizeof bpf_opcodes[0]));
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