2 * Debugger memory handling
4 * Copyright 1993 Eric Youngdale
5 * Copyright 1995 Alexandre Julliard
6 * Copyright 2000 Eric Pouech
18 #include "wine/winbase16.h"
20 #define DBG_V86_MODULE(seg) ((seg)>>16)
21 #define IS_SELECTOR_V86(seg) DBG_V86_MODULE(seg)
24 static void DEBUG_Die(const char* msg)
26 DEBUG_Printf(DBG_CHN_MESG, msg);
30 void* DEBUG_XMalloc(size_t size)
32 void *res = malloc(size ? size : 1);
34 DEBUG_Die("Memory exhausted.\n");
39 void* DEBUG_XReAlloc(void *ptr, size_t size)
41 void* res = realloc(ptr, size);
42 if ((res == NULL) && size)
43 DEBUG_Die("Memory exhausted.\n");
47 char* DEBUG_XStrDup(const char *str)
49 char *res = strdup(str);
51 DEBUG_Die("Memory exhausted.\n");
56 void DEBUG_FixAddress( DBG_ADDR *addr, DWORD def)
58 if (addr->seg == 0xffffffff) addr->seg = def;
59 if (!IS_SELECTOR_V86(addr->seg) && DEBUG_IsSelectorSystem(addr->seg)) addr->seg = 0;
62 BOOL DEBUG_FixSegment( DBG_ADDR* addr )
65 if (DEBUG_context.EFlags & V86_FLAG) {
66 addr->seg |= (DWORD)(GetExePtr(GetCurrentTask())) << 16;
72 int DEBUG_GetSelectorType( WORD sel )
78 if (IS_SELECTOR_V86(sel))
80 if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, sel, &le))
81 return le.HighWord.Bits.Default_Big ? 32 : 16;
82 /* selector doesn't exist */
86 /* Determine if sel is a system selector (i.e. not managed by Wine) */
87 BOOL DEBUG_IsSelectorSystem(WORD sel)
89 return !(sel & 4) || (((sel & 0xFFFF) >> 3) < 17);
93 DWORD DEBUG_ToLinear( const DBG_ADDR *addr )
99 if (IS_SELECTOR_V86(addr->seg))
100 return (DWORD) DOSMEM_MemoryBase(DBG_V86_MODULE(addr->seg)) + (((addr->seg)&0xFFFF)<<4) + addr->off;
102 if (DEBUG_IsSelectorSystem(addr->seg))
105 if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, addr->seg, &le)) {
106 return (le.HighWord.Bits.BaseHi << 24) + (le.HighWord.Bits.BaseMid << 16) + le.BaseLow + addr->off;
114 void DEBUG_GetCurrentAddress( DBG_ADDR *addr )
117 addr->seg = DEBUG_context.SegCs;
119 if (!DEBUG_FixSegment( addr ) && DEBUG_IsSelectorSystem(addr->seg))
121 addr->off = DEBUG_context.Eip;
122 #elif defined(__sparc__)
124 addr->off = DEBUG_context.pc;
126 # error You must define GET_IP for this CPU
130 void DEBUG_InvalAddr( const DBG_ADDR* addr )
132 DEBUG_Printf(DBG_CHN_MESG,"*** Invalid address ");
133 DEBUG_PrintAddress(addr, DEBUG_CurrThread->dbg_mode, FALSE);
134 DEBUG_Printf(DBG_CHN_MESG,"\n");
135 if (DBG_IVAR(ExtDbgOnInvalidAddress)) DEBUG_ExternalDebugger();
138 void DEBUG_InvalLinAddr( void* addr )
143 address.off = (unsigned long)addr;
144 DEBUG_InvalAddr( &address );
147 /***********************************************************************
150 * Read a memory value.
152 /* FIXME: this function is now getting closer and closer to
153 * DEBUG_ExprGetValue. They should be merged...
155 int DEBUG_ReadMemory( const DBG_VALUE* val )
157 int value = 0; /* to clear any unused byte */
158 int os = DEBUG_GetObjectSize(val->type);
160 assert(sizeof(value) >= os);
162 /* FIXME: only works on little endian systems */
164 if (val->cookie == DV_TARGET) {
165 DBG_ADDR addr = val->addr;
169 DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
171 lin = (void*)DEBUG_ToLinear( &addr );
173 DEBUG_READ_MEM_VERBOSE(lin, &value, os);
176 memcpy(&value, (void*)val->addr.off, os);
182 /***********************************************************************
185 * Store a value in memory.
187 void DEBUG_WriteMemory( const DBG_VALUE* val, int value )
189 int os = DEBUG_GetObjectSize(val->type);
191 assert(sizeof(value) >= os);
193 /* FIXME: only works on little endian systems */
195 if (val->cookie == DV_TARGET) {
196 DBG_ADDR addr = val->addr;
200 DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
202 lin = (void*)DEBUG_ToLinear( &addr );
203 DEBUG_WRITE_MEM_VERBOSE(lin, &value, os);
205 memcpy((void*)val->addr.off, &value, os);
210 /***********************************************************************
211 * DEBUG_ExamineMemory
213 * Implementation of the 'x' command.
215 void DEBUG_ExamineMemory( const DBG_VALUE *_value, int count, char format )
217 DBG_VALUE value = *_value;
220 struct datatype * testtype;
222 assert(_value->cookie == DV_TARGET || _value->cookie == DV_HOST);
225 DEBUG_FixAddress( &value.addr,
227 DEBUG_context.SegCs :
228 DEBUG_context.SegDs );
232 * Dereference pointer to get actual memory address we need to be
233 * reading. We will use the same segment as what we have already,
234 * and hope that this is a sensible thing to do.
236 if( value.type != NULL )
238 if( value.type == DEBUG_TypeIntConst )
241 * We know that we have the actual offset stored somewhere
242 * else in 32-bit space. Grab it, and we
245 unsigned int seg2 = value.addr.seg;
247 value.addr.off = DEBUG_GetExprValue(&value, NULL);
248 value.addr.seg = seg2;
252 if (DEBUG_TypeDerefPointer(&value, &testtype) == 0)
254 if( testtype != NULL || value.type == DEBUG_TypeIntConst )
256 value.addr.off = DEBUG_GetExprValue(&value, NULL);
260 else if (!value.addr.seg && !value.addr.off)
262 DEBUG_Printf(DBG_CHN_MESG,"Invalid expression\n");
266 if (format != 'i' && count > 1)
268 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );
269 DEBUG_Printf(DBG_CHN_MESG,": ");
272 pnt = (void*)DEBUG_ToLinear( &value.addr );
278 if (count == 1) count = 256;
281 if (!DEBUG_READ_MEM_VERBOSE(pnt, &wch, sizeof(wch)) || !wch)
284 DEBUG_Printf(DBG_CHN_MESG, "%c", (char)wch);
286 DEBUG_Printf(DBG_CHN_MESG,"\n");
292 if (count == 1) count = 256;
295 if (!DEBUG_READ_MEM_VERBOSE(pnt, &ch, sizeof(ch)) || !ch)
298 DEBUG_Output(DBG_CHN_MESG, &ch, 1);
300 DEBUG_Printf(DBG_CHN_MESG,"\n");
306 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, TRUE );
307 DEBUG_Printf(DBG_CHN_MESG,": ");
308 DEBUG_Disasm( &value.addr, TRUE );
309 DEBUG_Printf(DBG_CHN_MESG,"\n");
312 #define DO_DUMP2(_t,_l,_f,_vv) { \
314 for(i=0; i<count; i++) { \
315 if (!DEBUG_READ_MEM_VERBOSE(pnt, &_v, sizeof(_t))) break; \
316 DEBUG_Printf(DBG_CHN_MESG,_f,(_vv)); \
317 pnt += sizeof(_t); value.addr.off += sizeof(_t); \
318 if ((i % (_l)) == (_l)-1) { \
319 DEBUG_Printf(DBG_CHN_MESG,"\n"); \
320 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );\
321 DEBUG_Printf(DBG_CHN_MESG,": ");\
324 DEBUG_Printf(DBG_CHN_MESG,"\n"); \
327 #define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
329 case 'x': DO_DUMP(int, 4, " %8.8x");
330 case 'd': DO_DUMP(unsigned int, 4, " %10d");
331 case 'w': DO_DUMP(unsigned short, 8, " %04x");
332 case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
333 case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);