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1 | /* Bra.h -- Branch converters for executables\r |
2 | 2013-01-18 : Igor Pavlov : Public domain */\r |
3 | \r |
4 | #ifndef __BRA_H\r |
5 | #define __BRA_H\r |
6 | \r |
7 | #include "7zTypes.h"\r |
8 | \r |
9 | EXTERN_C_BEGIN\r |
10 | \r |
11 | /*\r |
12 | These functions convert relative addresses to absolute addresses\r |
13 | in CALL instructions to increase the compression ratio.\r |
14 | \r |
15 | In:\r |
16 | data - data buffer\r |
17 | size - size of data\r |
18 | ip - current virtual Instruction Pinter (IP) value\r |
19 | state - state variable for x86 converter\r |
20 | encoding - 0 (for decoding), 1 (for encoding)\r |
21 | \r |
22 | Out:\r |
23 | state - state variable for x86 converter\r |
24 | \r |
25 | Returns:\r |
26 | The number of processed bytes. If you call these functions with multiple calls,\r |
27 | you must start next call with first byte after block of processed bytes.\r |
28 | \r |
29 | Type Endian Alignment LookAhead\r |
30 | \r |
31 | x86 little 1 4\r |
32 | ARMT little 2 2\r |
33 | ARM little 4 0\r |
34 | PPC big 4 0\r |
35 | SPARC big 4 0\r |
36 | IA64 little 16 0\r |
37 | \r |
38 | size must be >= Alignment + LookAhead, if it's not last block.\r |
39 | If (size < Alignment + LookAhead), converter returns 0.\r |
40 | \r |
41 | Example:\r |
42 | \r |
43 | UInt32 ip = 0;\r |
44 | for ()\r |
45 | {\r |
46 | ; size must be >= Alignment + LookAhead, if it's not last block\r |
47 | SizeT processed = Convert(data, size, ip, 1);\r |
48 | data += processed;\r |
49 | size -= processed;\r |
50 | ip += processed;\r |
51 | }\r |
52 | */\r |
53 | \r |
54 | #define x86_Convert_Init(state) { state = 0; }\r |
55 | SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding);\r |
56 | SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);\r |
57 | SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);\r |
58 | SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);\r |
59 | SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);\r |
60 | SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);\r |
61 | \r |
62 | EXTERN_C_END\r |
63 | \r |
64 | #endif\r |