1 /* Bra.c -- Converters for RISC code 2 2010-04-16 : Igor Pavlov : Public domain */ 3 4 #include "Precomp.h" 5 6 #include "Bra.h" 7 8 SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) 9 { 10 SizeT i; 11 if (size < 4) 12 return 0; 13 size -= 4; 14 ip += 8; 15 for (i = 0; i <= size; i += 4) 16 { 17 if (data[i + 3] == 0xEB) 18 { 19 UInt32 dest; 20 UInt32 src = ((UInt32)data[i + 2] << 16) | ((UInt32)data[i + 1] << 8) | (data[i + 0]); 21 src <<= 2; 22 if (encoding) 23 dest = ip + (UInt32)i + src; 24 else 25 dest = src - (ip + (UInt32)i); 26 dest >>= 2; 27 data[i + 2] = (Byte)(dest >> 16); 28 data[i + 1] = (Byte)(dest >> 8); 29 data[i + 0] = (Byte)dest; 30 } 31 } 32 return i; 33 } 34 35 SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) 36 { 37 SizeT i; 38 if (size < 4) 39 return 0; 40 size -= 4; 41 ip += 4; 42 for (i = 0; i <= size; i += 2) 43 { 44 if ((data[i + 1] & 0xF8) == 0xF0 && 45 (data[i + 3] & 0xF8) == 0xF8) 46 { 47 UInt32 dest; 48 UInt32 src = 49 (((UInt32)data[i + 1] & 0x7) << 19) | 50 ((UInt32)data[i + 0] << 11) | 51 (((UInt32)data[i + 3] & 0x7) << 8) | 52 (data[i + 2]); 53 54 src <<= 1; 55 if (encoding) 56 dest = ip + (UInt32)i + src; 57 else 58 dest = src - (ip + (UInt32)i); 59 dest >>= 1; 60 61 data[i + 1] = (Byte)(0xF0 | ((dest >> 19) & 0x7)); 62 data[i + 0] = (Byte)(dest >> 11); 63 data[i + 3] = (Byte)(0xF8 | ((dest >> 8) & 0x7)); 64 data[i + 2] = (Byte)dest; 65 i += 2; 66 } 67 } 68 return i; 69 } 70 71 SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) 72 { 73 SizeT i; 74 if (size < 4) 75 return 0; 76 size -= 4; 77 for (i = 0; i <= size; i += 4) 78 { 79 if ((data[i] >> 2) == 0x12 && (data[i + 3] & 3) == 1) 80 { 81 UInt32 src = ((UInt32)(data[i + 0] & 3) << 24) | 82 ((UInt32)data[i + 1] << 16) | 83 ((UInt32)data[i + 2] << 8) | 84 ((UInt32)data[i + 3] & (~3)); 85 86 UInt32 dest; 87 if (encoding) 88 dest = ip + (UInt32)i + src; 89 else 90 dest = src - (ip + (UInt32)i); 91 data[i + 0] = (Byte)(0x48 | ((dest >> 24) & 0x3)); 92 data[i + 1] = (Byte)(dest >> 16); 93 data[i + 2] = (Byte)(dest >> 8); 94 data[i + 3] &= 0x3; 95 data[i + 3] |= dest; 96 } 97 } 98 return i; 99 } 100 101 SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) 102 { 103 UInt32 i; 104 if (size < 4) 105 return 0; 106 size -= 4; 107 for (i = 0; i <= size; i += 4) 108 { 109 if ((data[i] == 0x40 && (data[i + 1] & 0xC0) == 0x00) || 110 (data[i] == 0x7F && (data[i + 1] & 0xC0) == 0xC0)) 111 { 112 UInt32 src = 113 ((UInt32)data[i + 0] << 24) | 114 ((UInt32)data[i + 1] << 16) | 115 ((UInt32)data[i + 2] << 8) | 116 ((UInt32)data[i + 3]); 117 UInt32 dest; 118 119 src <<= 2; 120 if (encoding) 121 dest = ip + i + src; 122 else 123 dest = src - (ip + i); 124 dest >>= 2; 125 126 dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF) | (dest & 0x3FFFFF) | 0x40000000; 127 128 data[i + 0] = (Byte)(dest >> 24); 129 data[i + 1] = (Byte)(dest >> 16); 130 data[i + 2] = (Byte)(dest >> 8); 131 data[i + 3] = (Byte)dest; 132 } 133 } 134 return i; 135 } 136
