repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* Bra.c -- Converters for RISC code
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| 2 | 2010-04-16 : Igor Pavlov : Public domain */
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| 3 |
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| 4 | #include "Bra.h"
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| 5 |
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| 6 | SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
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| 7 | {
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| 8 | SizeT i;
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| 9 | if (size < 4)
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| 10 | return 0;
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| 11 | size -= 4;
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| 12 | ip += 8;
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| 13 | for (i = 0; i <= size; i += 4)
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| 14 | {
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| 15 | if (data[i + 3] == 0xEB)
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| 16 | {
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| 17 | UInt32 dest;
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| 18 | UInt32 src = ((UInt32)data[i + 2] << 16) | ((UInt32)data[i + 1] << 8) | (data[i + 0]);
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| 19 | src <<= 2;
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| 20 | if (encoding)
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| 21 | dest = ip + (UInt32)i + src;
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| 22 | else
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| 23 | dest = src - (ip + (UInt32)i);
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| 24 | dest >>= 2;
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| 25 | data[i + 2] = (Byte)(dest >> 16);
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| 26 | data[i + 1] = (Byte)(dest >> 8);
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| 27 | data[i + 0] = (Byte)dest;
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| 28 | }
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| 29 | }
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| 30 | return i;
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| 31 | }
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| 32 |
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| 33 | SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
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| 34 | {
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| 35 | SizeT i;
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| 36 | if (size < 4)
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| 37 | return 0;
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| 38 | size -= 4;
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| 39 | ip += 4;
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| 40 | for (i = 0; i <= size; i += 2)
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| 41 | {
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| 42 | if ((data[i + 1] & 0xF8) == 0xF0 &&
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| 43 | (data[i + 3] & 0xF8) == 0xF8)
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| 44 | {
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| 45 | UInt32 dest;
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| 46 | UInt32 src =
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| 47 | (((UInt32)data[i + 1] & 0x7) << 19) |
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| 48 | ((UInt32)data[i + 0] << 11) |
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| 49 | (((UInt32)data[i + 3] & 0x7) << 8) |
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| 50 | (data[i + 2]);
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| 51 |
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| 52 | src <<= 1;
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| 53 | if (encoding)
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| 54 | dest = ip + (UInt32)i + src;
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| 55 | else
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| 56 | dest = src - (ip + (UInt32)i);
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| 57 | dest >>= 1;
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| 58 |
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| 59 | data[i + 1] = (Byte)(0xF0 | ((dest >> 19) & 0x7));
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| 60 | data[i + 0] = (Byte)(dest >> 11);
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| 61 | data[i + 3] = (Byte)(0xF8 | ((dest >> 8) & 0x7));
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| 62 | data[i + 2] = (Byte)dest;
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| 63 | i += 2;
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| 64 | }
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| 65 | }
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| 66 | return i;
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| 67 | }
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| 68 |
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| 69 | SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
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| 70 | {
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| 71 | SizeT i;
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| 72 | if (size < 4)
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| 73 | return 0;
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| 74 | size -= 4;
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| 75 | for (i = 0; i <= size; i += 4)
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| 76 | {
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| 77 | if ((data[i] >> 2) == 0x12 && (data[i + 3] & 3) == 1)
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| 78 | {
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| 79 | UInt32 src = ((UInt32)(data[i + 0] & 3) << 24) |
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| 80 | ((UInt32)data[i + 1] << 16) |
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| 81 | ((UInt32)data[i + 2] << 8) |
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| 82 | ((UInt32)data[i + 3] & (~3));
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| 83 |
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| 84 | UInt32 dest;
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| 85 | if (encoding)
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| 86 | dest = ip + (UInt32)i + src;
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| 87 | else
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| 88 | dest = src - (ip + (UInt32)i);
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| 89 | data[i + 0] = (Byte)(0x48 | ((dest >> 24) & 0x3));
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| 90 | data[i + 1] = (Byte)(dest >> 16);
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| 91 | data[i + 2] = (Byte)(dest >> 8);
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| 92 | data[i + 3] &= 0x3;
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| 93 | data[i + 3] |= dest;
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| 94 | }
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| 95 | }
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| 96 | return i;
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| 97 | }
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| 98 |
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| 99 | SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
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| 100 | {
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| 101 | UInt32 i;
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| 102 | if (size < 4)
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| 103 | return 0;
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| 104 | size -= 4;
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| 105 | for (i = 0; i <= size; i += 4)
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| 106 | {
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| 107 | if ((data[i] == 0x40 && (data[i + 1] & 0xC0) == 0x00) ||
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| 108 | (data[i] == 0x7F && (data[i + 1] & 0xC0) == 0xC0))
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| 109 | {
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| 110 | UInt32 src =
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| 111 | ((UInt32)data[i + 0] << 24) |
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| 112 | ((UInt32)data[i + 1] << 16) |
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| 113 | ((UInt32)data[i + 2] << 8) |
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| 114 | ((UInt32)data[i + 3]);
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| 115 | UInt32 dest;
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| 116 |
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| 117 | src <<= 2;
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| 118 | if (encoding)
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| 119 | dest = ip + i + src;
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| 120 | else
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| 121 | dest = src - (ip + i);
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| 122 | dest >>= 2;
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| 123 |
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| 124 | dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF) | (dest & 0x3FFFFF) | 0x40000000;
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| 125 |
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| 126 | data[i + 0] = (Byte)(dest >> 24);
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| 127 | data[i + 1] = (Byte)(dest >> 16);
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| 128 | data[i + 2] = (Byte)(dest >> 8);
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| 129 | data[i + 3] = (Byte)dest;
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| 130 | }
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| 131 | }
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| 132 | return i;
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| 133 | }
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