Mercurial > vba-linux

     1 /* Bra.h -- Branch converters for executables

     2 2008-10-04 : Igor Pavlov : Public domain */

     3 

     4 #ifndef __BRA_H

     5 #define __BRA_H

     6 

     7 #include "Types.h"

     8 

     9 /*

    10 These functions convert relative addresses to absolute addresses

    11 in CALL instructions to increase the compression ratio.

    12   

    13   In:

    14     data     - data buffer

    15     size     - size of data

    16     ip       - current virtual Instruction Pinter (IP) value

    17     state    - state variable for x86 converter

    18     encoding - 0 (for decoding), 1 (for encoding)

    19   

    20   Out:

    21     state    - state variable for x86 converter

    22 

    23   Returns:

    24     The number of processed bytes. If you call these functions with multiple calls,

    25     you must start next call with first byte after block of processed bytes.

    26   

    27   Type   Endian  Alignment  LookAhead

    28   

    29   x86    little      1          4

    30   ARMT   little      2          2

    31   ARM    little      4          0

    32   PPC     big        4          0

    33   SPARC   big        4          0

    34   IA64   little     16          0

    35 

    36   size must be >= Alignment + LookAhead, if it's not last block.

    37   If (size < Alignment + LookAhead), converter returns 0.

    38 

    39   Example:

    40 

    41     UInt32 ip = 0;

    42     for ()

    43     {

    44       ; size must be >= Alignment + LookAhead, if it's not last block

    45       SizeT processed = Convert(data, size, ip, 1);

    46       data += processed;

    47       size -= processed;

    48       ip += processed;

    49     }

    50 */

    51 

    52 #define x86_Convert_Init(state) { state = 0; }

    53 SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding);

    54 SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);

    55 SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);

    56 SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);

    57 SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);

    58 SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);

    59 

    60 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:35:58 -0600
parents	f9f4f1b99eed
children