904 lines
29 KiB
C#
904 lines
29 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace DotNetDetour
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{
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/// <summary>
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/// 用于计算汇编指令长度，使用的是BlackBone的LDasm.c中的算法，我把他翻译成C#了
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/// </summary>
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public unsafe class LDasm
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{
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const int F_INVALID = 0x01;
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const int F_PREFIX = 0x02;
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const int F_REX = 0x04;
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const int F_MODRM = 0x08;
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const int F_SIB = 0x10;
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const int F_DISP = 0x20;
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const int F_IMM = 0x40;
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const int F_RELATIVE = 0x80;
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const int OP_NONE = 0x00;
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const int OP_INVALID = 0x80;
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const int OP_DATA_I8 = 0x01;
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const int OP_DATA_I16 = 0x02;
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const int OP_DATA_I16_I32 = 0x04;
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const int OP_DATA_I16_I32_I64 = 0x08;
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const int OP_EXTENDED = 0x10;
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const int OP_RELATIVE = 0x20;
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const int OP_MODRM = 0x40;
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const int OP_PREFIX = 0x80;
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struct ldasm_data
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{
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public byte flags;
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public byte rex;
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public byte modrm;
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public byte sib;
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public byte opcd_offset;
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public byte opcd_size;
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public byte disp_offset;
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public byte disp_size;
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public byte imm_offset;
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public byte imm_size;
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}
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static byte[] flags_table =
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{
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/* 00 */ OP_MODRM,
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/* 01 */ OP_MODRM,
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/* 02 */ OP_MODRM,
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/* 03 */ OP_MODRM,
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/* 04 */ OP_DATA_I8,
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/* 05 */ OP_DATA_I16_I32,
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/* 06 */ OP_NONE,
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/* 07 */ OP_NONE,
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/* 08 */ OP_MODRM,
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/* 09 */ OP_MODRM,
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/* 0A */ OP_MODRM,
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/* 0B */ OP_MODRM,
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/* 0C */ OP_DATA_I8,
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/* 0D */ OP_DATA_I16_I32,
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/* 0E */ OP_NONE,
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/* 0F */ OP_NONE,
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/* 10 */ OP_MODRM,
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/* 11 */ OP_MODRM,
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/* 12 */ OP_MODRM,
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/* 13 */ OP_MODRM,
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/* 14 */ OP_DATA_I8,
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/* 15 */ OP_DATA_I16_I32,
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/* 16 */ OP_NONE,
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/* 17 */ OP_NONE,
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/* 18 */ OP_MODRM,
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/* 19 */ OP_MODRM,
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/* 1A */ OP_MODRM,
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/* 1B */ OP_MODRM,
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/* 1C */ OP_DATA_I8,
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/* 1D */ OP_DATA_I16_I32,
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/* 1E */ OP_NONE,
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/* 1F */ OP_NONE,
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/* 20 */ OP_MODRM,
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/* 21 */ OP_MODRM,
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/* 22 */ OP_MODRM,
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/* 23 */ OP_MODRM,
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/* 24 */ OP_DATA_I8,
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/* 25 */ OP_DATA_I16_I32,
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/* 26 */ OP_PREFIX,
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/* 27 */ OP_NONE,
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/* 28 */ OP_MODRM,
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/* 29 */ OP_MODRM,
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/* 2A */ OP_MODRM,
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/* 2B */ OP_MODRM,
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/* 2C */ OP_DATA_I8,
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/* 2D */ OP_DATA_I16_I32,
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/* 2E */ OP_PREFIX,
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/* 2F */ OP_NONE,
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/* 30 */ OP_MODRM,
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/* 31 */ OP_MODRM,
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/* 32 */ OP_MODRM,
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/* 33 */ OP_MODRM,
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/* 34 */ OP_DATA_I8,
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/* 35 */ OP_DATA_I16_I32,
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/* 36 */ OP_PREFIX,
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/* 37 */ OP_NONE,
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/* 38 */ OP_MODRM,
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/* 39 */ OP_MODRM,
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/* 3A */ OP_MODRM,
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/* 3B */ OP_MODRM,
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/* 3C */ OP_DATA_I8,
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/* 3D */ OP_DATA_I16_I32,
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/* 3E */ OP_PREFIX,
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/* 3F */ OP_NONE,
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/* 40 */ OP_NONE,
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/* 41 */ OP_NONE,
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/* 42 */ OP_NONE,
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/* 43 */ OP_NONE,
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/* 44 */ OP_NONE,
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/* 45 */ OP_NONE,
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/* 46 */ OP_NONE,
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/* 47 */ OP_NONE,
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/* 48 */ OP_NONE,
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/* 49 */ OP_NONE,
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/* 4A */ OP_NONE,
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/* 4B */ OP_NONE,
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/* 4C */ OP_NONE,
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/* 4D */ OP_NONE,
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/* 4E */ OP_NONE,
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/* 4F */ OP_NONE,
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/* 50 */ OP_NONE,
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/* 51 */ OP_NONE,
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/* 52 */ OP_NONE,
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/* 53 */ OP_NONE,
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/* 54 */ OP_NONE,
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/* 55 */ OP_NONE,
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/* 56 */ OP_NONE,
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/* 57 */ OP_NONE,
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/* 58 */ OP_NONE,
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/* 59 */ OP_NONE,
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/* 5A */ OP_NONE,
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/* 5B */ OP_NONE,
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/* 5C */ OP_NONE,
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/* 5D */ OP_NONE,
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/* 5E */ OP_NONE,
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/* 5F */ OP_NONE,
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/* 60 */ OP_NONE,
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/* 61 */ OP_NONE,
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/* 62 */ OP_MODRM,
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/* 63 */ OP_MODRM,
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/* 64 */ OP_PREFIX,
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/* 65 */ OP_PREFIX,
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/* 66 */ OP_PREFIX,
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/* 67 */ OP_PREFIX,
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/* 68 */ OP_DATA_I16_I32,
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/* 69 */ OP_MODRM | OP_DATA_I16_I32,
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/* 6A */ OP_DATA_I8,
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/* 6B */ OP_MODRM | OP_DATA_I8,
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/* 6C */ OP_NONE,
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/* 6D */ OP_NONE,
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/* 6E */ OP_NONE,
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/* 6F */ OP_NONE,
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/* 70 */ OP_RELATIVE | OP_DATA_I8,
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/* 71 */ OP_RELATIVE | OP_DATA_I8,
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/* 72 */ OP_RELATIVE | OP_DATA_I8,
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/* 73 */ OP_RELATIVE | OP_DATA_I8,
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/* 74 */ OP_RELATIVE | OP_DATA_I8,
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/* 75 */ OP_RELATIVE | OP_DATA_I8,
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/* 76 */ OP_RELATIVE | OP_DATA_I8,
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/* 77 */ OP_RELATIVE | OP_DATA_I8,
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/* 78 */ OP_RELATIVE | OP_DATA_I8,
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/* 79 */ OP_RELATIVE | OP_DATA_I8,
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/* 7A */ OP_RELATIVE | OP_DATA_I8,
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/* 7B */ OP_RELATIVE | OP_DATA_I8,
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/* 7C */ OP_RELATIVE | OP_DATA_I8,
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/* 7D */ OP_RELATIVE | OP_DATA_I8,
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/* 7E */ OP_RELATIVE | OP_DATA_I8,
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/* 7F */ OP_RELATIVE | OP_DATA_I8,
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/* 80 */ OP_MODRM | OP_DATA_I8,
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/* 81 */ OP_MODRM | OP_DATA_I16_I32,
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/* 82 */ OP_MODRM | OP_DATA_I8,
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/* 83 */ OP_MODRM | OP_DATA_I8,
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/* 84 */ OP_MODRM,
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/* 85 */ OP_MODRM,
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/* 86 */ OP_MODRM,
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/* 87 */ OP_MODRM,
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/* 88 */ OP_MODRM,
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/* 89 */ OP_MODRM,
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/* 8A */ OP_MODRM,
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/* 8B */ OP_MODRM,
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/* 8C */ OP_MODRM,
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/* 8D */ OP_MODRM,
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/* 8E */ OP_MODRM,
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/* 8F */ OP_MODRM,
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/* 90 */ OP_NONE,
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/* 91 */ OP_NONE,
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/* 92 */ OP_NONE,
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/* 93 */ OP_NONE,
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/* 94 */ OP_NONE,
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/* 95 */ OP_NONE,
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/* 96 */ OP_NONE,
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/* 97 */ OP_NONE,
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/* 98 */ OP_NONE,
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/* 99 */ OP_NONE,
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/* 9A */ OP_DATA_I16 | OP_DATA_I16_I32,
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/* 9B */ OP_NONE,
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/* 9C */ OP_NONE,
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/* 9D */ OP_NONE,
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/* 9E */ OP_NONE,
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/* 9F */ OP_NONE,
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/* A0 */ OP_DATA_I8,
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/* A1 */ OP_DATA_I16_I32_I64,
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/* A2 */ OP_DATA_I8,
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/* A3 */ OP_DATA_I16_I32_I64,
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/* A4 */ OP_NONE,
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/* A5 */ OP_NONE,
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/* A6 */ OP_NONE,
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/* A7 */ OP_NONE,
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/* A8 */ OP_DATA_I8,
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/* A9 */ OP_DATA_I16_I32,
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/* AA */ OP_NONE,
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/* AB */ OP_NONE,
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/* AC */ OP_NONE,
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/* AD */ OP_NONE,
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/* AE */ OP_NONE,
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/* AF */ OP_NONE,
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/* B0 */ OP_DATA_I8,
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/* B1 */ OP_DATA_I8,
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/* B2 */ OP_DATA_I8,
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/* B3 */ OP_DATA_I8,
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/* B4 */ OP_DATA_I8,
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/* B5 */ OP_DATA_I8,
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/* B6 */ OP_DATA_I8,
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/* B7 */ OP_DATA_I8,
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/* B8 */ OP_DATA_I16_I32_I64,
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/* B9 */ OP_DATA_I16_I32_I64,
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/* BA */ OP_DATA_I16_I32_I64,
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/* BB */ OP_DATA_I16_I32_I64,
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/* BC */ OP_DATA_I16_I32_I64,
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/* BD */ OP_DATA_I16_I32_I64,
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/* BE */ OP_DATA_I16_I32_I64,
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/* BF */ OP_DATA_I16_I32_I64,
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/* C0 */ OP_MODRM | OP_DATA_I8,
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/* C1 */ OP_MODRM | OP_DATA_I8,
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/* C2 */ OP_DATA_I16,
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/* C3 */ OP_NONE,
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/* C4 */ OP_MODRM,
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/* C5 */ OP_MODRM,
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/* C6 */ OP_MODRM | OP_DATA_I8,
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/* C7 */ OP_MODRM | OP_DATA_I16_I32,
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/* C8 */ OP_DATA_I8 | OP_DATA_I16,
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/* C9 */ OP_NONE,
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/* CA */ OP_DATA_I16,
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/* CB */ OP_NONE,
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/* CC */ OP_NONE,
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/* CD */ OP_DATA_I8,
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/* CE */ OP_NONE,
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/* CF */ OP_NONE,
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/* D0 */ OP_MODRM,
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/* D1 */ OP_MODRM,
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/* D2 */ OP_MODRM,
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/* D3 */ OP_MODRM,
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/* D4 */ OP_DATA_I8,
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/* D5 */ OP_DATA_I8,
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/* D6 */ OP_NONE,
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/* D7 */ OP_NONE,
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/* D8 */ OP_MODRM,
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/* D9 */ OP_MODRM,
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/* DA */ OP_MODRM,
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/* DB */ OP_MODRM,
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/* DC */ OP_MODRM,
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/* DD */ OP_MODRM,
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/* DE */ OP_MODRM,
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/* DF */ OP_MODRM,
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/* E0 */ OP_RELATIVE | OP_DATA_I8,
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/* E1 */ OP_RELATIVE | OP_DATA_I8,
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/* E2 */ OP_RELATIVE | OP_DATA_I8,
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/* E3 */ OP_RELATIVE | OP_DATA_I8,
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/* E4 */ OP_DATA_I8,
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/* E5 */ OP_DATA_I8,
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/* E6 */ OP_DATA_I8,
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/* E7 */ OP_DATA_I8,
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/* E8 */ OP_RELATIVE | OP_DATA_I16_I32,
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/* E9 */ OP_RELATIVE | OP_DATA_I16_I32,
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/* EA */ OP_DATA_I16 | OP_DATA_I16_I32,
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/* EB */ OP_RELATIVE | OP_DATA_I8,
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/* EC */ OP_NONE,
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/* ED */ OP_NONE,
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/* EE */ OP_NONE,
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/* EF */ OP_NONE,
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/* F0 */ OP_PREFIX,
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/* F1 */ OP_NONE,
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/* F2 */ OP_PREFIX,
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/* F3 */ OP_PREFIX,
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/* F4 */ OP_NONE,
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/* F5 */ OP_NONE,
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/* F6 */ OP_MODRM,
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/* F7 */ OP_MODRM,
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/* F8 */ OP_NONE,
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/* F9 */ OP_NONE,
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/* FA */ OP_NONE,
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/* FB */ OP_NONE,
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/* FC */ OP_NONE,
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/* FD */ OP_NONE,
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/* FE */ OP_MODRM,
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/* FF */ OP_MODRM
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};
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static byte[] flags_table_ex =
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{
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/* 0F00 */ OP_MODRM,
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/* 0F01 */ OP_MODRM,
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/* 0F02 */ OP_MODRM,
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/* 0F03 */ OP_MODRM,
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/* 0F04 */ OP_INVALID,
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/* 0F05 */ OP_NONE,
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/* 0F06 */ OP_NONE,
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/* 0F07 */ OP_NONE,
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/* 0F08 */ OP_NONE,
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/* 0F09 */ OP_NONE,
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/* 0F0A */ OP_INVALID,
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/* 0F0B */ OP_NONE,
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/* 0F0C */ OP_INVALID,
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/* 0F0D */ OP_MODRM,
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/* 0F0E */ OP_INVALID,
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/* 0F0F */ OP_MODRM | OP_DATA_I8, //3Dnow
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/* 0F10 */ OP_MODRM,
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/* 0F11 */ OP_MODRM,
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/* 0F12 */ OP_MODRM,
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/* 0F13 */ OP_MODRM,
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/* 0F14 */ OP_MODRM,
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/* 0F15 */ OP_MODRM,
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/* 0F16 */ OP_MODRM,
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/* 0F17 */ OP_MODRM,
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/* 0F18 */ OP_MODRM,
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/* 0F19 */ OP_INVALID,
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/* 0F1A */ OP_INVALID,
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/* 0F1B */ OP_INVALID,
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/* 0F1C */ OP_INVALID,
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/* 0F1D */ OP_INVALID,
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/* 0F1E */ OP_INVALID,
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/* 0F1F */ OP_NONE,
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/* 0F20 */ OP_MODRM,
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/* 0F21 */ OP_MODRM,
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/* 0F22 */ OP_MODRM,
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/* 0F23 */ OP_MODRM,
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/* 0F24 */ OP_MODRM | OP_EXTENDED, //SSE5
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/* 0F25 */ OP_INVALID,
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/* 0F26 */ OP_MODRM,
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/* 0F27 */ OP_INVALID,
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/* 0F28 */ OP_MODRM,
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/* 0F29 */ OP_MODRM,
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/* 0F2A */ OP_MODRM,
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/* 0F2B */ OP_MODRM,
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/* 0F2C */ OP_MODRM,
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/* 0F2D */ OP_MODRM,
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/* 0F2E */ OP_MODRM,
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/* 0F2F */ OP_MODRM,
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/* 0F30 */ OP_NONE,
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/* 0F31 */ OP_NONE,
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/* 0F32 */ OP_NONE,
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/* 0F33 */ OP_NONE,
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/* 0F34 */ OP_NONE,
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/* 0F35 */ OP_NONE,
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/* 0F36 */ OP_INVALID,
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/* 0F37 */ OP_NONE,
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/* 0F38 */ OP_MODRM | OP_EXTENDED,
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/* 0F39 */ OP_INVALID,
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/* 0F3A */ OP_MODRM | OP_EXTENDED | OP_DATA_I8,
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/* 0F3B */ OP_INVALID,
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/* 0F3C */ OP_INVALID,
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/* 0F3D */ OP_INVALID,
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/* 0F3E */ OP_INVALID,
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/* 0F3F */ OP_INVALID,
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/* 0F40 */ OP_MODRM,
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/* 0F41 */ OP_MODRM,
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/* 0F42 */ OP_MODRM,
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/* 0F43 */ OP_MODRM,
|
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/* 0F44 */ OP_MODRM,
|
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/* 0F45 */ OP_MODRM,
|
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/* 0F46 */ OP_MODRM,
|
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/* 0F47 */ OP_MODRM,
|
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/* 0F48 */ OP_MODRM,
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/* 0F49 */ OP_MODRM,
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/* 0F4A */ OP_MODRM,
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/* 0F4B */ OP_MODRM,
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/* 0F4C */ OP_MODRM,
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/* 0F4D */ OP_MODRM,
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/* 0F4E */ OP_MODRM,
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/* 0F4F */ OP_MODRM,
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/* 0F50 */ OP_MODRM,
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/* 0F51 */ OP_MODRM,
|
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/* 0F52 */ OP_MODRM,
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/* 0F53 */ OP_MODRM,
|
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/* 0F54 */ OP_MODRM,
|
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/* 0F55 */ OP_MODRM,
|
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/* 0F56 */ OP_MODRM,
|
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/* 0F57 */ OP_MODRM,
|
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/* 0F58 */ OP_MODRM,
|
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/* 0F59 */ OP_MODRM,
|
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/* 0F5A */ OP_MODRM,
|
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/* 0F5B */ OP_MODRM,
|
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/* 0F5C */ OP_MODRM,
|
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/* 0F5D */ OP_MODRM,
|
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/* 0F5E */ OP_MODRM,
|
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/* 0F5F */ OP_MODRM,
|
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|
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/* 0F60 */ OP_MODRM,
|
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/* 0F61 */ OP_MODRM,
|
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/* 0F62 */ OP_MODRM,
|
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/* 0F63 */ OP_MODRM,
|
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/* 0F64 */ OP_MODRM,
|
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/* 0F65 */ OP_MODRM,
|
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/* 0F66 */ OP_MODRM,
|
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/* 0F67 */ OP_MODRM,
|
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/* 0F68 */ OP_MODRM,
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/* 0F69 */ OP_MODRM,
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/* 0F6A */ OP_MODRM,
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/* 0F6B */ OP_MODRM,
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/* 0F6C */ OP_MODRM,
|
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/* 0F6D */ OP_MODRM,
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/* 0F6E */ OP_MODRM,
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/* 0F6F */ OP_MODRM,
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/* 0F70 */ OP_MODRM | OP_DATA_I8,
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/* 0F71 */ OP_MODRM | OP_DATA_I8,
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/* 0F72 */ OP_MODRM | OP_DATA_I8,
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/* 0F73 */ OP_MODRM | OP_DATA_I8,
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/* 0F74 */ OP_MODRM,
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/* 0F75 */ OP_MODRM,
|
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/* 0F76 */ OP_MODRM,
|
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/* 0F77 */ OP_NONE,
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/* 0F78 */ OP_MODRM,
|
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/* 0F79 */ OP_MODRM,
|
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/* 0F7A */ OP_INVALID,
|
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/* 0F7B */ OP_INVALID,
|
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/* 0F7C */ OP_MODRM,
|
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/* 0F7D */ OP_MODRM,
|
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/* 0F7E */ OP_MODRM,
|
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/* 0F7F */ OP_MODRM,
|
||
|
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/* 0F80 */ OP_RELATIVE | OP_DATA_I16_I32,
|
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/* 0F81 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F82 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F83 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F84 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F85 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F86 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F87 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F88 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F89 */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F8A */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F8B */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F8C */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F8D */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F8E */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
/* 0F8F */ OP_RELATIVE | OP_DATA_I16_I32,
|
||
|
||
/* 0F90 */ OP_MODRM,
|
||
/* 0F91 */ OP_MODRM,
|
||
/* 0F92 */ OP_MODRM,
|
||
/* 0F93 */ OP_MODRM,
|
||
/* 0F94 */ OP_MODRM,
|
||
/* 0F95 */ OP_MODRM,
|
||
/* 0F96 */ OP_MODRM,
|
||
/* 0F97 */ OP_MODRM,
|
||
/* 0F98 */ OP_MODRM,
|
||
/* 0F99 */ OP_MODRM,
|
||
/* 0F9A */ OP_MODRM,
|
||
/* 0F9B */ OP_MODRM,
|
||
/* 0F9C */ OP_MODRM,
|
||
/* 0F9D */ OP_MODRM,
|
||
/* 0F9E */ OP_MODRM,
|
||
/* 0F9F */ OP_MODRM,
|
||
|
||
/* 0FA0 */ OP_NONE,
|
||
/* 0FA1 */ OP_NONE,
|
||
/* 0FA2 */ OP_NONE,
|
||
/* 0FA3 */ OP_MODRM,
|
||
/* 0FA4 */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FA5 */ OP_MODRM,
|
||
/* 0FA6 */ OP_INVALID,
|
||
/* 0FA7 */ OP_INVALID,
|
||
/* 0FA8 */ OP_NONE,
|
||
/* 0FA9 */ OP_NONE,
|
||
/* 0FAA */ OP_NONE,
|
||
/* 0FAB */ OP_MODRM,
|
||
/* 0FAC */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FAD */ OP_MODRM,
|
||
/* 0FAE */ OP_MODRM,
|
||
/* 0FAF */ OP_MODRM,
|
||
|
||
/* 0FB0 */ OP_MODRM,
|
||
/* 0FB1 */ OP_MODRM,
|
||
/* 0FB2 */ OP_MODRM,
|
||
/* 0FB3 */ OP_MODRM,
|
||
/* 0FB4 */ OP_MODRM,
|
||
/* 0FB5 */ OP_MODRM,
|
||
/* 0FB6 */ OP_MODRM,
|
||
/* 0FB7 */ OP_MODRM,
|
||
/* 0FB8 */ OP_MODRM,
|
||
/* 0FB9 */ OP_MODRM,
|
||
/* 0FBA */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FBB */ OP_MODRM,
|
||
/* 0FBC */ OP_MODRM,
|
||
/* 0FBD */ OP_MODRM,
|
||
/* 0FBE */ OP_MODRM,
|
||
/* 0FBF */ OP_MODRM,
|
||
|
||
/* 0FC0 */ OP_MODRM,
|
||
/* 0FC1 */ OP_MODRM,
|
||
/* 0FC2 */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FC3 */ OP_MODRM,
|
||
/* 0FC4 */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FC5 */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FC6 */ OP_MODRM | OP_DATA_I8,
|
||
/* 0FC7 */ OP_MODRM,
|
||
/* 0FC8 */ OP_NONE,
|
||
/* 0FC9 */ OP_NONE,
|
||
/* 0FCA */ OP_NONE,
|
||
/* 0FCB */ OP_NONE,
|
||
/* 0FCC */ OP_NONE,
|
||
/* 0FCD */ OP_NONE,
|
||
/* 0FCE */ OP_NONE,
|
||
/* 0FCF */ OP_NONE,
|
||
|
||
/* 0FD0 */ OP_MODRM,
|
||
/* 0FD1 */ OP_MODRM,
|
||
/* 0FD2 */ OP_MODRM,
|
||
/* 0FD3 */ OP_MODRM,
|
||
/* 0FD4 */ OP_MODRM,
|
||
/* 0FD5 */ OP_MODRM,
|
||
/* 0FD6 */ OP_MODRM,
|
||
/* 0FD7 */ OP_MODRM,
|
||
/* 0FD8 */ OP_MODRM,
|
||
/* 0FD9 */ OP_MODRM,
|
||
/* 0FDA */ OP_MODRM,
|
||
/* 0FDB */ OP_MODRM,
|
||
/* 0FDC */ OP_MODRM,
|
||
/* 0FDD */ OP_MODRM,
|
||
/* 0FDE */ OP_MODRM,
|
||
/* 0FDF */ OP_MODRM,
|
||
|
||
/* 0FE0 */ OP_MODRM,
|
||
/* 0FE1 */ OP_MODRM,
|
||
/* 0FE2 */ OP_MODRM,
|
||
/* 0FE3 */ OP_MODRM,
|
||
/* 0FE4 */ OP_MODRM,
|
||
/* 0FE5 */ OP_MODRM,
|
||
/* 0FE6 */ OP_MODRM,
|
||
/* 0FE7 */ OP_MODRM,
|
||
/* 0FE8 */ OP_MODRM,
|
||
/* 0FE9 */ OP_MODRM,
|
||
/* 0FEA */ OP_MODRM,
|
||
/* 0FEB */ OP_MODRM,
|
||
/* 0FEC */ OP_MODRM,
|
||
/* 0FED */ OP_MODRM,
|
||
/* 0FEE */ OP_MODRM,
|
||
/* 0FEF */ OP_MODRM,
|
||
|
||
/* 0FF0 */ OP_MODRM,
|
||
/* 0FF1 */ OP_MODRM,
|
||
/* 0FF2 */ OP_MODRM,
|
||
/* 0FF3 */ OP_MODRM,
|
||
/* 0FF4 */ OP_MODRM,
|
||
/* 0FF5 */ OP_MODRM,
|
||
/* 0FF6 */ OP_MODRM,
|
||
/* 0FF7 */ OP_MODRM,
|
||
/* 0FF8 */ OP_MODRM,
|
||
/* 0FF9 */ OP_MODRM,
|
||
/* 0FFA */ OP_MODRM,
|
||
/* 0FFB */ OP_MODRM,
|
||
/* 0FFC */ OP_MODRM,
|
||
/* 0FFD */ OP_MODRM,
|
||
/* 0FFE */ OP_MODRM,
|
||
/* 0FFF */ OP_INVALID,
|
||
};
|
||
|
||
static byte cflags(byte op)
|
||
{
|
||
return flags_table[op];
|
||
}
|
||
|
||
static byte cflags_ex(byte op)
|
||
{
|
||
return flags_table_ex[op];
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算大于等于 size 字节的最少指令的长度
|
||
/// </summary>
|
||
/// <param name="code"></param>
|
||
/// <returns></returns>
|
||
public static uint SizeofMinNumByte(void* code, int size)
|
||
{
|
||
if (IsARM())
|
||
return (uint)((size + 3) / 4) * 4; // 此为 jit 模式下的长度，不再支持 thumb
|
||
|
||
uint Length;
|
||
byte* pOpcode;
|
||
uint Result = 0;
|
||
ldasm_data data = new ldasm_data();
|
||
bool is64 = IntPtr.Size == 8;
|
||
do
|
||
{
|
||
Length = ldasm(code, data, is64);
|
||
|
||
pOpcode = (byte*)code + data.opcd_offset;
|
||
Result += Length;
|
||
if (Result >= size)
|
||
break;
|
||
if ((Length == 1) && (*pOpcode == 0xCC))
|
||
break;
|
||
|
||
code = (void*)((ulong)code + Length);
|
||
|
||
} while (Length>0);
|
||
|
||
return Result;
|
||
}
|
||
|
||
static bool? s_isArm;
|
||
public static bool IsARM()
|
||
{
|
||
if(s_isArm.HasValue)
|
||
return s_isArm.Value;
|
||
|
||
var arch = RuntimeInformation.ProcessArchitecture;
|
||
s_isArm = arch == Architecture.Arm || arch == Architecture.Arm64;
|
||
|
||
return s_isArm.Value;
|
||
}
|
||
|
||
public static bool IsArm32()
|
||
{
|
||
return IsARM() && IntPtr.Size == 4;
|
||
}
|
||
|
||
public static bool IsArm64()
|
||
{
|
||
return IsARM() && IntPtr.Size == 8;
|
||
}
|
||
|
||
static bool? s_isiOS;
|
||
public static bool IsiOS()
|
||
{
|
||
if(s_isiOS.HasValue)
|
||
return s_isiOS.Value;
|
||
|
||
s_isiOS = UnityEngine.SystemInfo.operatingSystem.ToLower().Contains("ios");
|
||
return s_isiOS.Value;
|
||
}
|
||
|
||
static bool? s_isIL2CPP;
|
||
public static bool IsIL2CPP()
|
||
{
|
||
if (s_isIL2CPP.HasValue)
|
||
return s_isIL2CPP.Value;
|
||
|
||
try
|
||
{
|
||
byte[] ilBody = typeof(LDasm).GetMethod("IsIL2CPP").GetMethodBody().GetILAsByteArray();
|
||
if (ilBody == null || ilBody.Length == 0)
|
||
s_isIL2CPP = true;
|
||
else
|
||
s_isIL2CPP = false;
|
||
}
|
||
catch
|
||
{
|
||
s_isIL2CPP = true;
|
||
}
|
||
|
||
return s_isIL2CPP.Value;
|
||
}
|
||
|
||
public static bool IsThumb(IntPtr code)
|
||
{
|
||
return IsArm32() && ((long)code & 0x1) == 0x1;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算 thumb 指令长度
|
||
/// </summary>
|
||
/// <param name="code"></param>
|
||
/// <param name="size"></param>
|
||
/// <returns></returns>
|
||
public static uint CalcARMThumbMinLen(void* code, int size)
|
||
{
|
||
uint len = 0;
|
||
|
||
ushort* ins = (ushort*)code;
|
||
while (true)
|
||
{
|
||
if (len >= size)
|
||
return len;
|
||
|
||
if (((*ins >> 13) & 3) == 3)
|
||
{
|
||
ins += 2;
|
||
len += 4;
|
||
}
|
||
else
|
||
{
|
||
ins++;
|
||
len += 2;
|
||
}
|
||
}
|
||
}
|
||
|
||
static uint ldasm(void* code, ldasm_data ld, bool is64)
|
||
{
|
||
byte* p = (byte*)code;
|
||
byte s, op, f;
|
||
byte rexw, pr_66, pr_67;
|
||
|
||
s = rexw = pr_66 = pr_67 = 0;
|
||
|
||
/* dummy check */
|
||
if ((int)code==0)
|
||
return 0;
|
||
|
||
/* init output data */
|
||
//memset(ld, 0, sizeof(ldasm_data));
|
||
|
||
/* phase 1: parse prefixies */
|
||
while ((cflags(*p) & OP_PREFIX)!=0)
|
||
{
|
||
if (*p == 0x66)
|
||
pr_66 = 1;
|
||
if (*p == 0x67)
|
||
pr_67 = 1;
|
||
p++; s++;
|
||
ld.flags |= F_PREFIX;
|
||
if (s == 15)
|
||
{
|
||
ld.flags |= F_INVALID;
|
||
return s;
|
||
}
|
||
}
|
||
|
||
/* parse REX prefix */
|
||
if (is64 && *p >> 4 == 4)
|
||
{
|
||
ld.rex = *p;
|
||
rexw = (byte)((ld.rex >> 3) & 1);
|
||
ld.flags |= F_REX;
|
||
p++; s++;
|
||
}
|
||
|
||
/* can be only one REX prefix */
|
||
if (is64 && *p >> 4 == 4)
|
||
{
|
||
ld.flags |= F_INVALID;
|
||
s++;
|
||
return s;
|
||
}
|
||
|
||
/* phase 2: parse opcode */
|
||
ld.opcd_offset = (byte)(p - (byte*)code);
|
||
ld.opcd_size = 1;
|
||
op = *p++; s++;
|
||
|
||
/* is 2 byte opcode? */
|
||
if (op == 0x0F)
|
||
{
|
||
op = *p++; s++;
|
||
ld.opcd_size++;
|
||
f = cflags_ex(op);
|
||
if ((f & OP_INVALID)!=0)
|
||
{
|
||
ld.flags |= F_INVALID;
|
||
return s;
|
||
}
|
||
/* for SSE instructions */
|
||
if ((f & OP_EXTENDED)!=0)
|
||
{
|
||
op = *p++; s++;
|
||
ld.opcd_size++;
|
||
}
|
||
}
|
||
else {
|
||
f = cflags(op);
|
||
/* pr_66 = pr_67 for opcodes A0-A3 */
|
||
if (op >= 0xA0 && op <= 0xA3)
|
||
pr_66 = pr_67;
|
||
}
|
||
|
||
/* phase 3: parse ModR/M, SIB and DISP */
|
||
if ((f & OP_MODRM)!=0)
|
||
{
|
||
byte mod = (byte)(*p >> 6);
|
||
byte ro = (byte)((*p & 0x38) >> 3);
|
||
byte rm = (byte)(*p & 7);
|
||
|
||
ld.modrm = *p++; s++;
|
||
ld.flags |= F_MODRM;
|
||
|
||
/* in F6,F7 opcodes immediate data present if R/O == 0 */
|
||
if (op == 0xF6 && (ro == 0 || ro == 1))
|
||
f |= OP_DATA_I8;
|
||
if (op == 0xF7 && (ro == 0 || ro == 1))
|
||
f |= OP_DATA_I16_I32_I64;
|
||
|
||
/* is SIB byte exist? */
|
||
if (mod != 3 && rm == 4 && !(!is64 && pr_67!=0))
|
||
{
|
||
ld.sib = *p++; s++;
|
||
ld.flags |= F_SIB;
|
||
|
||
/* if base == 5 and mod == 0 */
|
||
if ((ld.sib & 7) == 5 && mod == 0)
|
||
{
|
||
ld.disp_size = 4;
|
||
}
|
||
}
|
||
|
||
switch (mod)
|
||
{
|
||
case 0:
|
||
if (is64)
|
||
{
|
||
if (rm == 5)
|
||
{
|
||
ld.disp_size = 4;
|
||
if (is64)
|
||
ld.flags |= F_RELATIVE;
|
||
}
|
||
}
|
||
else if (pr_67!=0)
|
||
{
|
||
if (rm == 6)
|
||
ld.disp_size = 2;
|
||
}
|
||
else {
|
||
if (rm == 5)
|
||
ld.disp_size = 4;
|
||
}
|
||
break;
|
||
case 1:
|
||
ld.disp_size = 1;
|
||
break;
|
||
case 2:
|
||
if (is64)
|
||
ld.disp_size = 4;
|
||
else if (pr_67!=0)
|
||
ld.disp_size = 2;
|
||
else
|
||
ld.disp_size = 4;
|
||
break;
|
||
}
|
||
|
||
if (ld.disp_size>0)
|
||
{
|
||
ld.disp_offset = (byte)(p - (byte*)code);
|
||
p += ld.disp_size;
|
||
s += ld.disp_size;
|
||
ld.flags |= F_DISP;
|
||
}
|
||
}
|
||
|
||
/* phase 4: parse immediate data */
|
||
if (rexw!=0 && (f & OP_DATA_I16_I32_I64)!=0)
|
||
ld.imm_size = 8;
|
||
else if ((f & OP_DATA_I16_I32)!=0 || (f & OP_DATA_I16_I32_I64)!=0)
|
||
ld.imm_size = (byte)(4 - (pr_66 << 1));
|
||
|
||
/* if exist, add OP_DATA_I16 and OP_DATA_I8 size */
|
||
ld.imm_size += (byte)(f & 3);
|
||
|
||
if ((ld.imm_size)!=0)
|
||
{
|
||
s += ld.imm_size;
|
||
ld.imm_offset = (byte)(p - (byte*)code);
|
||
ld.flags |= F_IMM;
|
||
if ((f & OP_RELATIVE)!=0)
|
||
ld.flags |= F_RELATIVE;
|
||
}
|
||
|
||
/* instruction is too long */
|
||
if (s > 15)
|
||
ld.flags |= F_INVALID;
|
||
|
||
return s;
|
||
}
|
||
}
|
||
}
|