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- /* Bra.c -- Converters for RISC code
- 2008-10-04 : Igor Pavlov : Public domain */
- #include "Bra.h"
- SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
- {
- SizeT i;
- if (size < 4)
- return 0;
- size -= 4;
- ip += 8;
- for (i = 0; i <= size; i += 4)
- {
- if (data[i + 3] == 0xEB)
- {
- UInt32 dest;
- UInt32 src = ((UInt32)data[i + 2] << 16) | ((UInt32)data[i + 1] << 8) | (data[i + 0]);
- src <<= 2;
- if (encoding)
- dest = ip + (UInt32)i + src;
- else
- dest = src - (ip + (UInt32)i);
- dest >>= 2;
- data[i + 2] = (Byte)(dest >> 16);
- data[i + 1] = (Byte)(dest >> 8);
- data[i + 0] = (Byte)dest;
- }
- }
- return i;
- }
- SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
- {
- SizeT i;
- if (size < 4)
- return 0;
- size -= 4;
- ip += 4;
- for (i = 0; i <= size; i += 2)
- {
- if ((data[i + 1] & 0xF8) == 0xF0 &&
- (data[i + 3] & 0xF8) == 0xF8)
- {
- UInt32 dest;
- UInt32 src =
- (((UInt32)data[i + 1] & 0x7) << 19) |
- ((UInt32)data[i + 0] << 11) |
- (((UInt32)data[i + 3] & 0x7) << 8) |
- (data[i + 2]);
-
- src <<= 1;
- if (encoding)
- dest = ip + (UInt32)i + src;
- else
- dest = src - (ip + (UInt32)i);
- dest >>= 1;
-
- data[i + 1] = (Byte)(0xF0 | ((dest >> 19) & 0x7));
- data[i + 0] = (Byte)(dest >> 11);
- data[i + 3] = (Byte)(0xF8 | ((dest >> 8) & 0x7));
- data[i + 2] = (Byte)dest;
- i += 2;
- }
- }
- return i;
- }
- SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
- {
- SizeT i;
- if (size < 4)
- return 0;
- size -= 4;
- for (i = 0; i <= size; i += 4)
- {
- if ((data[i] >> 2) == 0x12 && (data[i + 3] & 3) == 1)
- {
- UInt32 src = ((UInt32)(data[i + 0] & 3) << 24) |
- ((UInt32)data[i + 1] << 16) |
- ((UInt32)data[i + 2] << 8) |
- ((UInt32)data[i + 3] & (~3));
-
- UInt32 dest;
- if (encoding)
- dest = ip + (UInt32)i + src;
- else
- dest = src - (ip + (UInt32)i);
- data[i + 0] = (Byte)(0x48 | ((dest >> 24) & 0x3));
- data[i + 1] = (Byte)(dest >> 16);
- data[i + 2] = (Byte)(dest >> 8);
- data[i + 3] &= 0x3;
- data[i + 3] |= dest;
- }
- }
- return i;
- }
- SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)
- {
- UInt32 i;
- if (size < 4)
- return 0;
- size -= 4;
- for (i = 0; i <= size; i += 4)
- {
- if ((data[i] == 0x40 && (data[i + 1] & 0xC0) == 0x00) ||
- (data[i] == 0x7F && (data[i + 1] & 0xC0) == 0xC0))
- {
- UInt32 src =
- ((UInt32)data[i + 0] << 24) |
- ((UInt32)data[i + 1] << 16) |
- ((UInt32)data[i + 2] << 8) |
- ((UInt32)data[i + 3]);
- UInt32 dest;
-
- src <<= 2;
- if (encoding)
- dest = ip + i + src;
- else
- dest = src - (ip + i);
- dest >>= 2;
-
- dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF) | (dest & 0x3FFFFF) | 0x40000000;
- data[i + 0] = (Byte)(dest >> 24);
- data[i + 1] = (Byte)(dest >> 16);
- data[i + 2] = (Byte)(dest >> 8);
- data[i + 3] = (Byte)dest;
- }
- }
- return i;
- }
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