b24e7fce |
1 | /* Bra.h -- Branch converters for executables |
2 | 2013-01-18 : Igor Pavlov : Public domain */ |
3 | |
4 | #ifndef __BRA_H |
5 | #define __BRA_H |
6 | |
7 | #include "7zTypes.h" |
8 | |
9 | EXTERN_C_BEGIN |
10 | |
11 | /* |
12 | These functions convert relative addresses to absolute addresses |
13 | in CALL instructions to increase the compression ratio. |
14 | |
15 | In: |
16 | data - data buffer |
17 | size - size of data |
18 | ip - current virtual Instruction Pinter (IP) value |
19 | state - state variable for x86 converter |
20 | encoding - 0 (for decoding), 1 (for encoding) |
21 | |
22 | Out: |
23 | state - state variable for x86 converter |
24 | |
25 | Returns: |
26 | The number of processed bytes. If you call these functions with multiple calls, |
27 | you must start next call with first byte after block of processed bytes. |
28 | |
29 | Type Endian Alignment LookAhead |
30 | |
31 | x86 little 1 4 |
32 | ARMT little 2 2 |
33 | ARM little 4 0 |
34 | PPC big 4 0 |
35 | SPARC big 4 0 |
36 | IA64 little 16 0 |
37 | |
38 | size must be >= Alignment + LookAhead, if it's not last block. |
39 | If (size < Alignment + LookAhead), converter returns 0. |
40 | |
41 | Example: |
42 | |
43 | UInt32 ip = 0; |
44 | for () |
45 | { |
46 | ; size must be >= Alignment + LookAhead, if it's not last block |
47 | SizeT processed = Convert(data, size, ip, 1); |
48 | data += processed; |
49 | size -= processed; |
50 | ip += processed; |
51 | } |
52 | */ |
53 | |
54 | #define x86_Convert_Init(state) { state = 0; } |
55 | SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding); |
56 | SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
57 | SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
58 | SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
59 | SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
60 | SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding); |
61 | |
62 | EXTERN_C_END |
63 | |
64 | #endif |