IDA Pro反编译代码类型转换参考

  1 /*
  2 
  3    This file contains definitions used by the Hex-Rays decompiler output.
  4    It has type definitions and convenience macros to make the
  5    output more readable.
  6 
  7    Copyright (c) 2007-2011 Hex-Rays
  8 
  9 */
 10 
 11 #if defined(__GNUC__)
 12   typedef          long long ll;
 13   typedef unsigned long long ull;
 14   #define __int64 long long
 15   #define __int32 int
 16   #define __int16 short
 17   #define __int8  char
 18   #define MAKELL(num) num ## LL
 19   #define FMT_64 "ll"
 20 #elif defined(_MSC_VER)
 21   typedef          __int64 ll;
 22   typedef unsigned __int64 ull;
 23   #define MAKELL(num) num ## i64
 24   #define FMT_64 "I64"
 25 #elif defined (__BORLANDC__)
 26   typedef          __int64 ll;
 27   typedef unsigned __int64 ull;
 28   #define MAKELL(num) num ## i64
 29   #define FMT_64 "L"
 30 #else
 31   #error "unknown compiler"
 32 #endif
 33 typedef unsigned int uint;
 34 typedef unsigned char uchar;
 35 typedef unsigned short ushort;
 36 typedef unsigned long ulong;
 37 
 38 typedef          char   int8;
 39 typedef   signed char   sint8;
 40 typedef unsigned char   uint8;
 41 typedef          short  int16;
 42 typedef   signed short  sint16;
 43 typedef unsigned short  uint16;
 44 typedef          int    int32;
 45 typedef   signed int    sint32;
 46 typedef unsigned int    uint32;
 47 typedef ll              int64;
 48 typedef ll              sint64;
 49 typedef ull             uint64;
 50 
 51 // Partially defined types:
 52 #define _BYTE  uint8
 53 #define _WORD  uint16
 54 #define _DWORD uint32
 55 #define _QWORD uint64
 56 #if !defined(_MSC_VER)
 57 #define _LONGLONG __int128
 58 #endif
 59 
 60 #ifndef _WINDOWS_
 61 typedef int8 BYTE;
 62 typedef int16 WORD;
 63 typedef int32 DWORD;
 64 typedef int32 LONG;
 65 #endif
 66 typedef int64 QWORD;
 67 #ifndef __cplusplus
 68 typedef int bool;       // we want to use bool in our C programs
 69 #endif
 70 
 71 // Some convenience macros to make partial accesses nicer
 72 // first unsigned macros:
 73 #define LOBYTE(x)   (*((_BYTE*)&(x)))   // low byte
 74 #define LOWORD(x)   (*((_WORD*)&(x)))   // low word
 75 #define LODWORD(x)  (*((_DWORD*)&(x)))  // low dword
 76 #define HIBYTE(x)   (*((_BYTE*)&(x)+1))
 77 #define HIWORD(x)   (*((_WORD*)&(x)+1))
 78 #define HIDWORD(x)  (*((_DWORD*)&(x)+1))
 79 #define BYTEn(x, n)   (*((_BYTE*)&(x)+n))
 80 #define WORDn(x, n)   (*((_WORD*)&(x)+n))
 81 #define BYTE1(x)   BYTEn(x,  1)         // byte 1 (counting from 0)
 82 #define BYTE2(x)   BYTEn(x,  2)
 83 #define BYTE3(x)   BYTEn(x,  3)
 84 #define BYTE4(x)   BYTEn(x,  4)
 85 #define BYTE5(x)   BYTEn(x,  5)
 86 #define BYTE6(x)   BYTEn(x,  6)
 87 #define BYTE7(x)   BYTEn(x,  7)
 88 #define BYTE8(x)   BYTEn(x,  8)
 89 #define BYTE9(x)   BYTEn(x,  9)
 90 #define BYTE10(x)  BYTEn(x, 10)
 91 #define BYTE11(x)  BYTEn(x, 11)
 92 #define BYTE12(x)  BYTEn(x, 12)
 93 #define BYTE13(x)  BYTEn(x, 13)
 94 #define BYTE14(x)  BYTEn(x, 14)
 95 #define BYTE15(x)  BYTEn(x, 15)
 96 #define WORD1(x)   WORDn(x,  1)
 97 #define WORD2(x)   WORDn(x,  2)         // third word of the object, unsigned
 98 #define WORD3(x)   WORDn(x,  3)
 99 #define WORD4(x)   WORDn(x,  4)
100 #define WORD5(x)   WORDn(x,  5)
101 #define WORD6(x)   WORDn(x,  6)
102 #define WORD7(x)   WORDn(x,  7)
103 
104 // now signed macros (the same but with sign extension)
105 #define SLOBYTE(x)   (*((int8*)&(x)))
106 #define SLOWORD(x)   (*((int16*)&(x)))
107 #define SLODWORD(x)  (*((int32*)&(x)))
108 #define SHIBYTE(x)   (*((int8*)&(x)+1))
109 #define SHIWORD(x)   (*((int16*)&(x)+1))
110 #define SHIDWORD(x)  (*((int32*)&(x)+1))
111 #define SBYTEn(x, n)   (*((int8*)&(x)+n))
112 #define SWORDn(x, n)   (*((int16*)&(x)+n))
113 #define SBYTE1(x)   SBYTEn(x,  1)
114 #define SBYTE2(x)   SBYTEn(x,  2)
115 #define SBYTE3(x)   SBYTEn(x,  3)
116 #define SBYTE4(x)   SBYTEn(x,  4)
117 #define SBYTE5(x)   SBYTEn(x,  5)
118 #define SBYTE6(x)   SBYTEn(x,  6)
119 #define SBYTE7(x)   SBYTEn(x,  7)
120 #define SBYTE8(x)   SBYTEn(x,  8)
121 #define SBYTE9(x)   SBYTEn(x,  9)
122 #define SBYTE10(x)  SBYTEn(x, 10)
123 #define SBYTE11(x)  SBYTEn(x, 11)
124 #define SBYTE12(x)  SBYTEn(x, 12)
125 #define SBYTE13(x)  SBYTEn(x, 13)
126 #define SBYTE14(x)  SBYTEn(x, 14)
127 #define SBYTE15(x)  SBYTEn(x, 15)
128 #define SWORD1(x)   SWORDn(x,  1)
129 #define SWORD2(x)   SWORDn(x,  2)
130 #define SWORD3(x)   SWORDn(x,  3)
131 #define SWORD4(x)   SWORDn(x,  4)
132 #define SWORD5(x)   SWORDn(x,  5)
133 #define SWORD6(x)   SWORDn(x,  6)
134 #define SWORD7(x)   SWORDn(x,  7)
135 
136 
137 // Helper functions to represent some assembly instructions.
138 
139 #ifdef __cplusplus
140 
141 // Fill memory block with an integer value
142 inline void memset32(void *ptr, uint32 value, int count)
143 {
144   uint32 *p = (uint32 *)ptr;
145   for ( int i=0; i < count; i++ )
146     *p++ = value;
147 }
148 
149 // Generate a reference to pair of operands
150 template<class T>  int16 __PAIR__( int8  high, T low) { return ((( int16)high) << sizeof(high)*8) | uint8(low); }
151 template<class T>  int32 __PAIR__( int16 high, T low) { return ((( int32)high) << sizeof(high)*8) | uint16(low); }
152 template<class T>  int64 __PAIR__( int32 high, T low) { return ((( int64)high) << sizeof(high)*8) | uint32(low); }
153 template<class T> uint16 __PAIR__(uint8  high, T low) { return (((uint16)high) << sizeof(high)*8) | uint8(low); }
154 template<class T> uint32 __PAIR__(uint16 high, T low) { return (((uint32)high) << sizeof(high)*8) | uint16(low); }
155 template<class T> uint64 __PAIR__(uint32 high, T low) { return (((uint64)high) << sizeof(high)*8) | uint32(low); }
156 
157 // rotate left
158 template<class T> T __ROL__(T value, uint count)
159 {
160   const uint nbits = sizeof(T) * 8;
161   count %= nbits;
162 
163   T high = value >> (nbits - count);
164   value <<= count;
165   value |= high;
166   return value;
167 }
168 
169 // rotate right
170 template<class T> T __ROR__(T value, uint count)
171 {
172   const uint nbits = sizeof(T) * 8;
173   count %= nbits;
174 
175   T low = value << (nbits - count);
176   value >>= count;
177   value |= low;
178   return value;
179 }
180 
181 // carry flag of left shift
182 template<class T> int8 __MKCSHL__(T value, uint count)
183 {
184   const uint nbits = sizeof(T) * 8;
185   count %= nbits;
186 
187   return (value >> (nbits-count)) & 1;
188 }
189 
190 // carry flag of right shift
191 template<class T> int8 __MKCSHR__(T value, uint count)
192 {
193   return (value >> (count-1)) & 1;
194 }
195 
196 // sign flag
197 template<class T> int8 __SETS__(T x)
198 {
199   if ( sizeof(T) == 1 )
200     return int8(x) < 0;
201   if ( sizeof(T) == 2 )
202     return int16(x) < 0;
203   if ( sizeof(T) == 4 )
204     return int32(x) < 0;
205   return int64(x) < 0;
206 }
207 
208 // overflow flag of subtraction (x-y)
209 template<class T, class U> int8 __OFSUB__(T x, U y)
210 {
211   if ( sizeof(T) < sizeof(U) )
212   {
213     U x2 = x;
214     int8 sx = __SETS__(x2);
215     return (sx ^ __SETS__(y)) & (sx ^ __SETS__(x2-y));
216   }
217   else
218   {
219     T y2 = y;
220     int8 sx = __SETS__(x);
221     return (sx ^ __SETS__(y2)) & (sx ^ __SETS__(x-y2));
222   }
223 }
224 
225 // overflow flag of addition (x+y)
226 template<class T, class U> int8 __OFADD__(T x, U y)
227 {
228   if ( sizeof(T) < sizeof(U) )
229   {
230     U x2 = x;
231     int8 sx = __SETS__(x2);
232     return ((1 ^ sx) ^ __SETS__(y)) & (sx ^ __SETS__(x2+y));
233   }
234   else
235   {
236     T y2 = y;
237     int8 sx = __SETS__(x);
238     return ((1 ^ sx) ^ __SETS__(y2)) & (sx ^ __SETS__(x+y2));
239   }
240 }
241 
242 // carry flag of subtraction (x-y)
243 template<class T, class U> int8 __CFSUB__(T x, U y)
244 {
245   int size = sizeof(T) > sizeof(U) ? sizeof(T) : sizeof(U);
246   if ( size == 1 )
247     return uint8(x) < uint8(y);
248   if ( size == 2 )
249     return uint16(x) < uint16(y);
250   if ( size == 4 )
251     return uint32(x) < uint32(y);
252   return uint64(x) < uint64(y);
253 }
254 
255 // carry flag of addition (x+y)
256 template<class T, class U> int8 __CFADD__(T x, U y)
257 {
258   int size = sizeof(T) > sizeof(U) ? sizeof(T) : sizeof(U);
259   if ( size == 1 )
260     return uint8(x) > uint8(x+y);
261   if ( size == 2 )
262     return uint16(x) > uint16(x+y);
263   if ( size == 4 )
264     return uint32(x) > uint32(x+y);
265   return uint64(x) > uint64(x+y);
266 }
267 
268 #else
269 // The following definition is not quite correct because it always returns
270 // uint64. The above C++ functions are good, though.
271 #define __PAIR__(high, low) (((uint64)(high)<<sizeof(high)*8) | low)
272 // For C, we just provide macros, they are not quite correct.
273 #define __ROL__(x, y) __rotl__(x, y)      // Rotate left
274 #define __ROR__(x, y) __rotr__(x, y)      // Rotate right
275 #define __CFSHL__(x, y) invalid_operation // Generate carry flag for (x<<y)
276 #define __CFSHR__(x, y) invalid_operation // Generate carry flag for (x>>y)
277 #define __CFADD__(x, y) invalid_operation // Generate carry flag for (x+y)
278 #define __CFSUB__(x, y) invalid_operation // Generate carry flag for (x-y)
279 #define __OFADD__(x, y) invalid_operation // Generate overflow flag for (x+y)
280 #define __OFSUB__(x, y) invalid_operation // Generate overflow flag for (x-y)
281 #endif
282 
283 // No definition for rcl/rcr because the carry flag is unknown
284 #define __RCL__(x, y)    invalid_operation // Rotate left thru carry
285 #define __RCR__(x, y)    invalid_operation // Rotate right thru carry
286 #define __MKCRCL__(x, y) invalid_operation // Generate carry flag for a RCL
287 #define __MKCRCR__(x, y) invalid_operation // Generate carry flag for a RCR
288 #define __SETP__(x, y)   invalid_operation // Generate parity flag for (x-y)
289 
290 // In the decompilation listing there are some objects declarared as _UNKNOWN
291 // because we could not determine their types. Since the C compiler does not
292 // accept void item declarations, we replace them by anything of our choice,
293 // for example a char:
294 
295 #define _UNKNOWN char
296 
297 #ifdef _MSC_VER
298 #define snprintf _snprintf
299 #define vsnprintf _vsnprintf
300 #endif

 

posted @ 2017-10-19 14:46  bamb00  阅读(...)  评论(... 编辑 收藏