2 * Debugger memory handling
4 * Copyright 1993 Eric Youngdale
5 * Copyright 1995 Alexandre Julliard
6 * Copyright 2000 Eric Pouech
17 #define IS_VM86_MODE() (DEBUG_context.EFlags & V86_FLAG)
20 static void DEBUG_Die(const char* msg)
22 DEBUG_Printf(DBG_CHN_MESG, msg);
26 void* DEBUG_XMalloc(size_t size)
28 void *res = malloc(size ? size : 1);
30 DEBUG_Die("Memory exhausted.\n");
35 void* DEBUG_XReAlloc(void *ptr, size_t size)
37 void* res = realloc(ptr, size);
38 if ((res == NULL) && size)
39 DEBUG_Die("Memory exhausted.\n");
43 char* DEBUG_XStrDup(const char *str)
45 char *res = strdup(str);
47 DEBUG_Die("Memory exhausted.\n");
51 enum dbg_mode DEBUG_GetSelectorType( WORD sel )
56 if (IS_VM86_MODE()) return MODE_VM86;
57 if (sel == 0) return MODE_32;
58 if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, sel, &le))
59 return le.HighWord.Bits.Default_Big ? MODE_32 : MODE_16;
60 /* selector doesn't exist */
67 void DEBUG_FixAddress( DBG_ADDR *addr, DWORD def)
69 if (addr->seg == 0xffffffff) addr->seg = def;
70 if (DEBUG_IsSelectorSystem(addr->seg)) addr->seg = 0;
73 /* Determine if sel is a system selector (i.e. not managed by Wine) */
74 BOOL DEBUG_IsSelectorSystem(WORD sel)
76 if (IS_VM86_MODE()) return FALSE; /* no system selectors in vm86 mode */
77 return !(sel & 4) || ((sel >> 3) < 17);
81 DWORD DEBUG_ToLinear( const DBG_ADDR *addr )
86 if (IS_VM86_MODE()) return (DWORD)(LOWORD(addr->seg) << 4) + addr->off;
88 if (DEBUG_IsSelectorSystem(addr->seg))
91 if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, addr->seg, &le)) {
92 return (le.HighWord.Bits.BaseHi << 24) + (le.HighWord.Bits.BaseMid << 16) + le.BaseLow + addr->off;
100 void DEBUG_GetCurrentAddress( DBG_ADDR *addr )
103 addr->seg = DEBUG_context.SegCs;
105 if (DEBUG_IsSelectorSystem(addr->seg))
107 addr->off = DEBUG_context.Eip;
108 #elif defined(__sparc__)
110 addr->off = DEBUG_context.pc;
112 # error You must define GET_IP for this CPU
116 void DEBUG_InvalAddr( const DBG_ADDR* addr )
118 DEBUG_Printf(DBG_CHN_MESG,"*** Invalid address ");
119 DEBUG_PrintAddress(addr, DEBUG_CurrThread->dbg_mode, FALSE);
120 DEBUG_Printf(DBG_CHN_MESG,"\n");
121 if (DBG_IVAR(ExtDbgOnInvalidAddress)) DEBUG_ExternalDebugger();
124 void DEBUG_InvalLinAddr( void* addr )
129 address.off = (unsigned long)addr;
130 DEBUG_InvalAddr( &address );
133 /***********************************************************************
136 * Read a memory value.
138 /* FIXME: this function is now getting closer and closer to
139 * DEBUG_ExprGetValue. They should be merged...
141 int DEBUG_ReadMemory( const DBG_VALUE* val )
143 int value = 0; /* to clear any unused byte */
144 int os = DEBUG_GetObjectSize(val->type);
146 assert(sizeof(value) >= os);
148 /* FIXME: only works on little endian systems */
150 if (val->cookie == DV_TARGET) {
151 DBG_ADDR addr = val->addr;
155 DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
157 lin = (void*)DEBUG_ToLinear( &addr );
159 DEBUG_READ_MEM_VERBOSE(lin, &value, os);
162 memcpy(&value, (void*)val->addr.off, os);
168 /***********************************************************************
171 * Store a value in memory.
173 void DEBUG_WriteMemory( const DBG_VALUE* val, int value )
175 int os = DEBUG_GetObjectSize(val->type);
177 assert(sizeof(value) >= os);
179 /* FIXME: only works on little endian systems */
181 if (val->cookie == DV_TARGET) {
182 DBG_ADDR addr = val->addr;
186 DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
188 lin = (void*)DEBUG_ToLinear( &addr );
189 DEBUG_WRITE_MEM_VERBOSE(lin, &value, os);
191 memcpy((void*)val->addr.off, &value, os);
195 /***********************************************************************
198 * Get the address from a value
200 BOOL DEBUG_GrabAddress( DBG_VALUE* value, BOOL fromCode )
202 assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
205 DEBUG_FixAddress( &value->addr,
206 (fromCode) ? DEBUG_context.SegCs : DEBUG_context.SegDs);
210 * Dereference pointer to get actual memory address we need to be
211 * reading. We will use the same segment as what we have already,
212 * and hope that this is a sensible thing to do.
214 if (value->type != NULL) {
215 if (value->type == DEBUG_GetBasicType(DT_BASIC_CONST_INT)) {
217 * We know that we have the actual offset stored somewhere
218 * else in 32-bit space. Grab it, and we
221 unsigned int seg2 = value->addr.seg;
223 value->addr.off = DEBUG_GetExprValue(value, NULL);
224 value->addr.seg = seg2;
226 struct datatype * testtype;
228 if (DEBUG_TypeDerefPointer(value, &testtype) == 0)
230 if (testtype != NULL || value->type == DEBUG_GetBasicType(DT_BASIC_CONST_INT))
231 value->addr.off = DEBUG_GetExprValue(value, NULL);
233 } else if (!value->addr.seg && !value->addr.off) {
234 DEBUG_Printf(DBG_CHN_MESG,"Invalid expression\n");
240 /***********************************************************************
241 * DEBUG_ExamineMemory
243 * Implementation of the 'x' command.
245 void DEBUG_ExamineMemory( const DBG_VALUE *_value, int count, char format )
247 DBG_VALUE value = *_value;
251 if (!DEBUG_GrabAddress(&value, (format == 'i'))) return;
253 if (format != 'i' && count > 1)
255 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );
256 DEBUG_Printf(DBG_CHN_MESG,": ");
259 pnt = (void*)DEBUG_ToLinear( &value.addr );
265 if (count == 1) count = 256;
268 if (!DEBUG_READ_MEM_VERBOSE(pnt, &wch, sizeof(wch)) || !wch)
271 DEBUG_Printf(DBG_CHN_MESG, "%c", (char)wch);
273 DEBUG_Printf(DBG_CHN_MESG,"\n");
279 if (count == 1) count = 256;
282 if (!DEBUG_READ_MEM_VERBOSE(pnt, &ch, sizeof(ch)) || !ch)
285 DEBUG_Output(DBG_CHN_MESG, &ch, 1);
287 DEBUG_Printf(DBG_CHN_MESG,"\n");
291 while (count-- && DEBUG_DisassembleInstruction( &value.addr ));
293 #define DO_DUMP2(_t,_l,_f,_vv) { \
295 for(i=0; i<count; i++) { \
296 if (!DEBUG_READ_MEM_VERBOSE(pnt, &_v, sizeof(_t))) break; \
297 DEBUG_Printf(DBG_CHN_MESG,_f,(_vv)); \
298 pnt += sizeof(_t); value.addr.off += sizeof(_t); \
299 if ((i % (_l)) == (_l)-1) { \
300 DEBUG_Printf(DBG_CHN_MESG,"\n"); \
301 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );\
302 DEBUG_Printf(DBG_CHN_MESG,": ");\
305 DEBUG_Printf(DBG_CHN_MESG,"\n"); \
308 #define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
310 case 'x': DO_DUMP(int, 4, " %8.8x");
311 case 'd': DO_DUMP(unsigned int, 4, " %10d");
312 case 'w': DO_DUMP(unsigned short, 8, " %04x");
313 case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
314 case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);