b24e7fce |
1 | /* BraIA64.c -- Converter for IA-64 code |
2 | 2017-01-26 : Igor Pavlov : Public domain */ |
3 | |
4 | #include "Precomp.h" |
5 | |
6 | #include "CpuArch.h" |
7 | #include "Bra.h" |
8 | |
9 | SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding) |
10 | { |
11 | SizeT i; |
12 | if (size < 16) |
13 | return 0; |
14 | size -= 16; |
15 | i = 0; |
16 | do |
17 | { |
18 | unsigned m = ((UInt32)0x334B0000 >> (data[i] & 0x1E)) & 3; |
19 | if (m) |
20 | { |
21 | m++; |
22 | do |
23 | { |
24 | Byte *p = data + (i + (size_t)m * 5 - 8); |
25 | if (((p[3] >> m) & 15) == 5 |
26 | && (((p[-1] | ((UInt32)p[0] << 8)) >> m) & 0x70) == 0) |
27 | { |
28 | unsigned raw = GetUi32(p); |
29 | unsigned v = raw >> m; |
30 | v = (v & 0xFFFFF) | ((v & (1 << 23)) >> 3); |
31 | |
32 | v <<= 4; |
33 | if (encoding) |
34 | v += ip + (UInt32)i; |
35 | else |
36 | v -= ip + (UInt32)i; |
37 | v >>= 4; |
38 | |
39 | v &= 0x1FFFFF; |
40 | v += 0x700000; |
41 | v &= 0x8FFFFF; |
42 | raw &= ~((UInt32)0x8FFFFF << m); |
43 | raw |= (v << m); |
44 | SetUi32(p, raw); |
45 | } |
46 | } |
47 | while (++m <= 4); |
48 | } |
49 | i += 16; |
50 | } |
51 | while (i <= size); |
52 | return i; |
53 | } |