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64 lines
1.8 KiB
64 lines
1.8 KiB
/* Bra.h -- Branch converters for executables |
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2013-01-18 : Igor Pavlov : Public domain */ |
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#ifndef __BRA_H |
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#define __BRA_H |
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#include "7zTypes.h" |
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EXTERN_C_BEGIN |
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/* |
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These functions convert relative addresses to absolute addresses |
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in CALL instructions to increase the compression ratio. |
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In: |
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data - data buffer |
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size - size of data |
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ip - current virtual Instruction Pinter (IP) value |
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state - state variable for x86 converter |
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encoding - 0 (for decoding), 1 (for encoding) |
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Out: |
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state - state variable for x86 converter |
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Returns: |
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The number of processed bytes. If you call these functions with multiple calls, |
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you must start next call with first byte after block of processed bytes. |
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Type Endian Alignment LookAhead |
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x86 little 1 4 |
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ARMT little 2 2 |
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ARM little 4 0 |
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PPC big 4 0 |
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SPARC big 4 0 |
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IA64 little 16 0 |
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size must be >= Alignment + LookAhead, if it's not last block. |
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If (size < Alignment + LookAhead), converter returns 0. |
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Example: |
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UInt32 ip = 0; |
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for () |
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{ |
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; size must be >= Alignment + LookAhead, if it's not last block |
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SizeT processed = Convert(data, size, ip, 1); |
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data += processed; |
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size -= processed; |
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ip += processed; |
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} |
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*/ |
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#define x86_Convert_Init(state) { state = 0; } |
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SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding); |
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SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
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EXTERN_C_END |
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#endif
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