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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 99 | pmbaty | 1 | /* Bra.h -- Branch converters for executables |
| 2 | 2008-10-04 : Igor Pavlov : Public domain */ |
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| 3 | |||
| 4 | #ifndef __BRA_H |
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| 5 | #define __BRA_H |
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| 6 | |||
| 7 | #include "Types.h" |
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| 8 | |||
| 9 | /* |
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| 10 | These functions convert relative addresses to absolute addresses |
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| 11 | in CALL instructions to increase the compression ratio. |
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| 12 | |||
| 13 | In: |
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| 14 | data - data buffer |
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| 15 | size - size of data |
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| 16 | ip - current virtual Instruction Pinter (IP) value |
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| 17 | state - state variable for x86 converter |
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| 18 | encoding - 0 (for decoding), 1 (for encoding) |
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| 19 | |||
| 20 | Out: |
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| 21 | state - state variable for x86 converter |
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| 22 | |||
| 23 | Returns: |
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| 24 | The number of processed bytes. If you call these functions with multiple calls, |
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| 25 | you must start next call with first byte after block of processed bytes. |
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| 26 | |||
| 27 | Type Endian Alignment LookAhead |
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| 28 | |||
| 29 | x86 little 1 4 |
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| 30 | ARMT little 2 2 |
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| 31 | ARM little 4 0 |
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| 32 | PPC big 4 0 |
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| 33 | SPARC big 4 0 |
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| 34 | IA64 little 16 0 |
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| 35 | |||
| 36 | size must be >= Alignment + LookAhead, if it's not last block. |
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| 37 | If (size < Alignment + LookAhead), converter returns 0. |
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| 38 | |||
| 39 | Example: |
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| 40 | |||
| 41 | UInt32 ip = 0; |
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| 42 | for () |
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| 43 | { |
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| 44 | ; size must be >= Alignment + LookAhead, if it's not last block |
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| 45 | SizeT processed = Convert(data, size, ip, 1); |
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| 46 | data += processed; |
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| 47 | size -= processed; |
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| 48 | ip += processed; |
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| 49 | } |
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| 50 | */ |
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| 51 | |||
| 52 | #define x86_Convert_Init(state) { state = 0; } |
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| 53 | SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding); |
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| 54 | SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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| 55 | SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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| 56 | SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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| 57 | SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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| 58 | SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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| 59 | |||
| 60 | #endif |