1 /* BraIA64.c -- Converter for IA-64 code 2 2008-10-04 : Igor Pavlov : Public domain */ 3 4 #include "Bra.h" 5 6 static const Byte kBranchTable[32] = 7 { 8 0, 0, 0, 0, 0, 0, 0, 0, 9 0, 0, 0, 0, 0, 0, 0, 0, 10 4, 4, 6, 6, 0, 0, 7, 7, 11 4, 4, 0, 0, 4, 4, 0, 0 12 }; 13 14 SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) 15 { 16 SizeT i; 17 if (size < 16) 18 return 0; 19 size -= 16; 20 for (i = 0; i <= size; i += 16) 21 { 22 UInt32 instrTemplate = data[i] & 0x1F; 23 UInt32 mask = kBranchTable[instrTemplate]; 24 UInt32 bitPos = 5; 25 int slot; 26 for (slot = 0; slot < 3; slot++, bitPos += 41) 27 { 28 UInt32 bytePos, bitRes; 29 UInt64 instruction, instNorm; 30 int j; 31 if (((mask >> slot) & 1) == 0) 32 continue; 33 bytePos = (bitPos >> 3); 34 bitRes = bitPos & 0x7; 35 instruction = 0; 36 for (j = 0; j < 6; j++) 37 instruction += (UInt64)data[i + j + bytePos] << (8 * j); 38 39 instNorm = instruction >> bitRes; 40 if (((instNorm >> 37) & 0xF) == 0x5 && ((instNorm >> 9) & 0x7) == 0) 41 { 42 UInt32 src = (UInt32)((instNorm >> 13) & 0xFFFFF); 43 UInt32 dest; 44 src |= ((UInt32)(instNorm >> 36) & 1) << 20; 45 46 src <<= 4; 47 48 if (encoding) 49 dest = ip + (UInt32)i + src; 50 else 51 dest = src - (ip + (UInt32)i); 52 53 dest >>= 4; 54 55 instNorm &= ~((UInt64)(0x8FFFFF) << 13); 56 instNorm |= ((UInt64)(dest & 0xFFFFF) << 13); 57 instNorm |= ((UInt64)(dest & 0x100000) << (36 - 20)); 58 59 instruction &= (1 << bitRes) - 1; 60 instruction |= (instNorm << bitRes); 61 for (j = 0; j < 6; j++) 62 data[i + j + bytePos] = (Byte)(instruction >> (8 * j)); 63 } 64 } 65 } 66 return i; 67 } 68
