1 /* BraIA64.c -- Converter for IA-64 code 2 2013-11-12 : Igor Pavlov : Public domain */ 3 4 #include "Precomp.h" 5 6 #include "Bra.h" 7 8 static const Byte kBranchTable[32] = 9 { 10 0, 0, 0, 0, 0, 0, 0, 0, 11 0, 0, 0, 0, 0, 0, 0, 0, 12 4, 4, 6, 6, 0, 0, 7, 7, 13 4, 4, 0, 0, 4, 4, 0, 0 14 }; 15 16 SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) 17 { 18 SizeT i; 19 if (size < 16) 20 return 0; 21 size -= 16; 22 for (i = 0; i <= size; i += 16) 23 { 24 UInt32 instrTemplate = data[i] & 0x1F; 25 UInt32 mask = kBranchTable[instrTemplate]; 26 UInt32 bitPos = 5; 27 int slot; 28 for (slot = 0; slot < 3; slot++, bitPos += 41) 29 { 30 UInt32 bytePos, bitRes; 31 UInt64 instruction, instNorm; 32 int j; 33 if (((mask >> slot) & 1) == 0) 34 continue; 35 bytePos = (bitPos >> 3); 36 bitRes = bitPos & 0x7; 37 instruction = 0; 38 for (j = 0; j < 6; j++) 39 instruction += (UInt64)data[i + j + bytePos] << (8 * j); 40 41 instNorm = instruction >> bitRes; 42 if (((instNorm >> 37) & 0xF) == 0x5 && ((instNorm >> 9) & 0x7) == 0) 43 { 44 UInt32 src = (UInt32)((instNorm >> 13) & 0xFFFFF); 45 UInt32 dest; 46 src |= ((UInt32)(instNorm >> 36) & 1) << 20; 47 48 src <<= 4; 49 50 if (encoding) 51 dest = ip + (UInt32)i + src; 52 else 53 dest = src - (ip + (UInt32)i); 54 55 dest >>= 4; 56 57 instNorm &= ~((UInt64)(0x8FFFFF) << 13); 58 instNorm |= ((UInt64)(dest & 0xFFFFF) << 13); 59 instNorm |= ((UInt64)(dest & 0x100000) << (36 - 20)); 60 61 instruction &= (1 << bitRes) - 1; 62 instruction |= (instNorm << bitRes); 63 for (j = 0; j < 6; j++) 64 data[i + j + bytePos] = (Byte)(instruction >> (8 * j)); 65 } 66 } 67 } 68 return i; 69 } 70
