| 1 | /* Bra.c -- Converters for RISC code\r |
| 2 | 2021-02-09 : Igor Pavlov : Public domain */\r |
| 3 | \r |
| 4 | #include "Precomp.h"\r |
| 5 | \r |
| 6 | #include "CpuArch.h"\r |
| 7 | #include "Bra.h"\r |
| 8 | \r |
| 9 | SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r |
| 10 | {\r |
| 11 | Byte *p;\r |
| 12 | const Byte *lim;\r |
| 13 | size &= ~(size_t)3;\r |
| 14 | ip += 4;\r |
| 15 | p = data;\r |
| 16 | lim = data + size;\r |
| 17 | \r |
| 18 | if (encoding)\r |
| 19 | \r |
| 20 | for (;;)\r |
| 21 | {\r |
| 22 | for (;;)\r |
| 23 | {\r |
| 24 | if (p >= lim)\r |
| 25 | return (SizeT)(p - data);\r |
| 26 | p += 4;\r |
| 27 | if (p[-1] == 0xEB)\r |
| 28 | break;\r |
| 29 | }\r |
| 30 | {\r |
| 31 | UInt32 v = GetUi32(p - 4);\r |
| 32 | v <<= 2;\r |
| 33 | v += ip + (UInt32)(p - data);\r |
| 34 | v >>= 2;\r |
| 35 | v &= 0x00FFFFFF;\r |
| 36 | v |= 0xEB000000;\r |
| 37 | SetUi32(p - 4, v);\r |
| 38 | }\r |
| 39 | }\r |
| 40 | \r |
| 41 | for (;;)\r |
| 42 | {\r |
| 43 | for (;;)\r |
| 44 | {\r |
| 45 | if (p >= lim)\r |
| 46 | return (SizeT)(p - data);\r |
| 47 | p += 4;\r |
| 48 | if (p[-1] == 0xEB)\r |
| 49 | break;\r |
| 50 | }\r |
| 51 | {\r |
| 52 | UInt32 v = GetUi32(p - 4);\r |
| 53 | v <<= 2;\r |
| 54 | v -= ip + (UInt32)(p - data);\r |
| 55 | v >>= 2;\r |
| 56 | v &= 0x00FFFFFF;\r |
| 57 | v |= 0xEB000000;\r |
| 58 | SetUi32(p - 4, v);\r |
| 59 | }\r |
| 60 | }\r |
| 61 | }\r |
| 62 | \r |
| 63 | \r |
| 64 | SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r |
| 65 | {\r |
| 66 | Byte *p;\r |
| 67 | const Byte *lim;\r |
| 68 | size &= ~(size_t)1;\r |
| 69 | p = data;\r |
| 70 | lim = data + size - 4;\r |
| 71 | \r |
| 72 | if (encoding)\r |
| 73 | \r |
| 74 | for (;;)\r |
| 75 | {\r |
| 76 | UInt32 b1;\r |
| 77 | for (;;)\r |
| 78 | {\r |
| 79 | UInt32 b3;\r |
| 80 | if (p > lim)\r |
| 81 | return (SizeT)(p - data);\r |
| 82 | b1 = p[1];\r |
| 83 | b3 = p[3];\r |
| 84 | p += 2;\r |
| 85 | b1 ^= 8;\r |
| 86 | if ((b3 & b1) >= 0xF8)\r |
| 87 | break;\r |
| 88 | }\r |
| 89 | {\r |
| 90 | UInt32 v =\r |
| 91 | ((UInt32)b1 << 19)\r |
| 92 | + (((UInt32)p[1] & 0x7) << 8)\r |
| 93 | + (((UInt32)p[-2] << 11))\r |
| 94 | + (p[0]);\r |
| 95 | \r |
| 96 | p += 2;\r |
| 97 | {\r |
| 98 | UInt32 cur = (ip + (UInt32)(p - data)) >> 1;\r |
| 99 | v += cur;\r |
| 100 | }\r |
| 101 | \r |
| 102 | p[-4] = (Byte)(v >> 11);\r |
| 103 | p[-3] = (Byte)(0xF0 | ((v >> 19) & 0x7));\r |
| 104 | p[-2] = (Byte)v;\r |
| 105 | p[-1] = (Byte)(0xF8 | (v >> 8));\r |
| 106 | }\r |
| 107 | }\r |
| 108 | \r |
| 109 | for (;;)\r |
| 110 | {\r |
| 111 | UInt32 b1;\r |
| 112 | for (;;)\r |
| 113 | {\r |
| 114 | UInt32 b3;\r |
| 115 | if (p > lim)\r |
| 116 | return (SizeT)(p - data);\r |
| 117 | b1 = p[1];\r |
| 118 | b3 = p[3];\r |
| 119 | p += 2;\r |
| 120 | b1 ^= 8;\r |
| 121 | if ((b3 & b1) >= 0xF8)\r |
| 122 | break;\r |
| 123 | }\r |
| 124 | {\r |
| 125 | UInt32 v =\r |
| 126 | ((UInt32)b1 << 19)\r |
| 127 | + (((UInt32)p[1] & 0x7) << 8)\r |
| 128 | + (((UInt32)p[-2] << 11))\r |
| 129 | + (p[0]);\r |
| 130 | \r |
| 131 | p += 2;\r |
| 132 | {\r |
| 133 | UInt32 cur = (ip + (UInt32)(p - data)) >> 1;\r |
| 134 | v -= cur;\r |
| 135 | }\r |
| 136 | \r |
| 137 | /*\r |
| 138 | SetUi16(p - 4, (UInt16)(((v >> 11) & 0x7FF) | 0xF000));\r |
| 139 | SetUi16(p - 2, (UInt16)(v | 0xF800));\r |
| 140 | */\r |
| 141 | \r |
| 142 | p[-4] = (Byte)(v >> 11);\r |
| 143 | p[-3] = (Byte)(0xF0 | ((v >> 19) & 0x7));\r |
| 144 | p[-2] = (Byte)v;\r |
| 145 | p[-1] = (Byte)(0xF8 | (v >> 8));\r |
| 146 | }\r |
| 147 | }\r |
| 148 | }\r |
| 149 | \r |
| 150 | \r |
| 151 | SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r |
| 152 | {\r |
| 153 | Byte *p;\r |
| 154 | const Byte *lim;\r |
| 155 | size &= ~(size_t)3;\r |
| 156 | ip -= 4;\r |
| 157 | p = data;\r |
| 158 | lim = data + size;\r |
| 159 | \r |
| 160 | for (;;)\r |
| 161 | {\r |
| 162 | for (;;)\r |
| 163 | {\r |
| 164 | if (p >= lim)\r |
| 165 | return (SizeT)(p - data);\r |
| 166 | p += 4;\r |
| 167 | /* if ((v & 0xFC000003) == 0x48000001) */\r |
| 168 | if ((p[-4] & 0xFC) == 0x48 && (p[-1] & 3) == 1)\r |
| 169 | break;\r |
| 170 | }\r |
| 171 | {\r |
| 172 | UInt32 v = GetBe32(p - 4);\r |
| 173 | if (encoding)\r |
| 174 | v += ip + (UInt32)(p - data);\r |
| 175 | else\r |
| 176 | v -= ip + (UInt32)(p - data);\r |
| 177 | v &= 0x03FFFFFF;\r |
| 178 | v |= 0x48000000;\r |
| 179 | SetBe32(p - 4, v);\r |
| 180 | }\r |
| 181 | }\r |
| 182 | }\r |
| 183 | \r |
| 184 | \r |
| 185 | SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r |
| 186 | {\r |
| 187 | Byte *p;\r |
| 188 | const Byte *lim;\r |
| 189 | size &= ~(size_t)3;\r |
| 190 | ip -= 4;\r |
| 191 | p = data;\r |
| 192 | lim = data + size;\r |
| 193 | \r |
| 194 | for (;;)\r |
| 195 | {\r |
| 196 | for (;;)\r |
| 197 | {\r |
| 198 | if (p >= lim)\r |
| 199 | return (SizeT)(p - data);\r |
| 200 | /*\r |
| 201 | v = GetBe32(p);\r |
| 202 | p += 4;\r |
| 203 | m = v + ((UInt32)5 << 29);\r |
| 204 | m ^= (UInt32)7 << 29;\r |
| 205 | m += (UInt32)1 << 22;\r |
| 206 | if ((m & ((UInt32)0x1FF << 23)) == 0)\r |
| 207 | break;\r |
| 208 | */\r |
| 209 | p += 4;\r |
| 210 | if ((p[-4] == 0x40 && (p[-3] & 0xC0) == 0) ||\r |
| 211 | (p[-4] == 0x7F && (p[-3] >= 0xC0)))\r |
| 212 | break;\r |
| 213 | }\r |
| 214 | {\r |
| 215 | UInt32 v = GetBe32(p - 4);\r |
| 216 | v <<= 2;\r |
| 217 | if (encoding)\r |
| 218 | v += ip + (UInt32)(p - data);\r |
| 219 | else\r |
| 220 | v -= ip + (UInt32)(p - data);\r |
| 221 | \r |
| 222 | v &= 0x01FFFFFF;\r |
| 223 | v -= (UInt32)1 << 24;\r |
| 224 | v ^= 0xFF000000;\r |
| 225 | v >>= 2;\r |
| 226 | v |= 0x40000000;\r |
| 227 | SetBe32(p - 4, v);\r |
| 228 | }\r |
| 229 | }\r |
| 230 | }\r |