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1 /* Bra.h -- Branch converters for executables
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2 2008-10-04 : Igor Pavlov : Public domain */
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3
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4 #ifndef __BRA_H
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5 #define __BRA_H
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6
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7 #include "Types.h"
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8
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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
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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
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20 Out:
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21 state - state variable for x86 converter
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22
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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
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27 Type Endian Alignment LookAhead
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28
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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
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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
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39 Example:
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40
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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
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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
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60 #endif
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