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