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| 1 /* Bra.h -- Branch converters for executables |
| 2 2009-02-07 : Igor Pavlov : Public domain */ |
| 3 |
| 4 #ifndef __BRA_H |
| 5 #define __BRA_H |
| 6 |
| 7 #include "Types.h" |
| 8 |
| 9 #ifdef __cplusplus |
| 10 extern "C" { |
| 11 #endif |
| 12 |
| 13 /* |
| 14 These functions convert relative addresses to absolute addresses |
| 15 in CALL instructions to increase the compression ratio. |
| 16 |
| 17 In: |
| 18 data - data buffer |
| 19 size - size of data |
| 20 ip - current virtual Instruction Pinter (IP) value |
| 21 state - state variable for x86 converter |
| 22 encoding - 0 (for decoding), 1 (for encoding) |
| 23 |
| 24 Out: |
| 25 state - state variable for x86 converter |
| 26 |
| 27 Returns: |
| 28 The number of processed bytes. If you call these functions with multiple cal
ls, |
| 29 you must start next call with first byte after block of processed bytes. |
| 30 |
| 31 Type Endian Alignment LookAhead |
| 32 |
| 33 x86 little 1 4 |
| 34 ARMT little 2 2 |
| 35 ARM little 4 0 |
| 36 PPC big 4 0 |
| 37 SPARC big 4 0 |
| 38 IA64 little 16 0 |
| 39 |
| 40 size must be >= Alignment + LookAhead, if it's not last block. |
| 41 If (size < Alignment + LookAhead), converter returns 0. |
| 42 |
| 43 Example: |
| 44 |
| 45 UInt32 ip = 0; |
| 46 for () |
| 47 { |
| 48 ; size must be >= Alignment + LookAhead, if it's not last block |
| 49 SizeT processed = Convert(data, size, ip, 1); |
| 50 data += processed; |
| 51 size -= processed; |
| 52 ip += processed; |
| 53 } |
| 54 */ |
| 55 |
| 56 #define x86_Convert_Init(state) { state = 0; } |
| 57 SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding
); |
| 58 SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
| 59 SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
| 60 SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
| 61 SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
| 62 SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
| 63 |
| 64 #ifdef __cplusplus |
| 65 } |
| 66 #endif |
| 67 |
| 68 #endif |
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