| /* BraIA64.c -- Converter for IA-64 code |
| 2008-10-04 : Igor Pavlov : Public domain */ |
| |
| #include "Bra.h" |
| |
| static const Byte kBranchTable[32] = |
| { |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 4, 4, 6, 6, 0, 0, 7, 7, |
| 4, 4, 0, 0, 4, 4, 0, 0 |
| }; |
| |
| SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) |
| { |
| SizeT i; |
| if (size < 16) |
| return 0; |
| size -= 16; |
| for (i = 0; i <= size; i += 16) |
| { |
| UInt32 instrTemplate = data[i] & 0x1F; |
| UInt32 mask = kBranchTable[instrTemplate]; |
| UInt32 bitPos = 5; |
| int slot; |
| for (slot = 0; slot < 3; slot++, bitPos += 41) |
| { |
| UInt32 bytePos, bitRes; |
| UInt64 instruction, instNorm; |
| int j; |
| if (((mask >> slot) & 1) == 0) |
| continue; |
| bytePos = (bitPos >> 3); |
| bitRes = bitPos & 0x7; |
| instruction = 0; |
| for (j = 0; j < 6; j++) |
| instruction += (UInt64)data[i + j + bytePos] << (8 * j); |
| |
| instNorm = instruction >> bitRes; |
| if (((instNorm >> 37) & 0xF) == 0x5 && ((instNorm >> 9) & 0x7) == 0) |
| { |
| UInt32 src = (UInt32)((instNorm >> 13) & 0xFFFFF); |
| UInt32 dest; |
| src |= ((UInt32)(instNorm >> 36) & 1) << 20; |
| |
| src <<= 4; |
| |
| if (encoding) |
| dest = ip + (UInt32)i + src; |
| else |
| dest = src - (ip + (UInt32)i); |
| |
| dest >>= 4; |
| |
| instNorm &= ~((UInt64)(0x8FFFFF) << 13); |
| instNorm |= ((UInt64)(dest & 0xFFFFF) << 13); |
| instNorm |= ((UInt64)(dest & 0x100000) << (36 - 20)); |
| |
| instruction &= (1 << bitRes) - 1; |
| instruction |= (instNorm << bitRes); |
| for (j = 0; j < 6; j++) |
| data[i + j + bytePos] = (Byte)(instruction >> (8 * j)); |
| } |
| } |
| } |
| return i; |
| } |