2 * Debugger memory handling
4 * Copyright 1993 Eric Youngdale
5 * Copyright 1995 Alexandre Julliard
6 * Copyright 2000 Eric Pouech
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "wine/port.h"
33 #define IS_VM86_MODE() (DEBUG_context.EFlags & V86_FLAG)
36 static void DEBUG_Die(const char* msg)
38 DEBUG_Printf(DBG_CHN_MESG, msg);
42 void* DEBUG_XMalloc(size_t size)
44 void *res = malloc(size ? size : 1);
46 DEBUG_Die("Memory exhausted.\n");
51 void* DEBUG_XReAlloc(void *ptr, size_t size)
53 void* res = realloc(ptr, size);
54 if ((res == NULL) && size)
55 DEBUG_Die("Memory exhausted.\n");
59 char* DEBUG_XStrDup(const char *str)
61 char *res = strdup(str);
63 DEBUG_Die("Memory exhausted.\n");
67 enum dbg_mode DEBUG_GetSelectorType( WORD sel )
72 if (IS_VM86_MODE()) return MODE_VM86;
73 if (sel == 0) return MODE_32;
74 if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, sel, &le))
75 return le.HighWord.Bits.Default_Big ? MODE_32 : MODE_16;
76 /* selector doesn't exist */
83 void DEBUG_FixAddress( DBG_ADDR *addr, DWORD def)
85 if (addr->seg == 0xffffffff) addr->seg = def;
86 if (DEBUG_IsSelectorSystem(addr->seg)) addr->seg = 0;
89 /* Determine if sel is a system selector (i.e. not managed by Wine) */
90 BOOL DEBUG_IsSelectorSystem(WORD sel)
92 if (IS_VM86_MODE()) return FALSE; /* no system selectors in vm86 mode */
93 return !(sel & 4) || ((sel >> 3) < 17);
97 DWORD DEBUG_ToLinear( const DBG_ADDR *addr )
102 if (IS_VM86_MODE()) return (DWORD)(LOWORD(addr->seg) << 4) + addr->off;
104 if (DEBUG_IsSelectorSystem(addr->seg))
107 if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, addr->seg, &le)) {
108 return (le.HighWord.Bits.BaseHi << 24) + (le.HighWord.Bits.BaseMid << 16) + le.BaseLow + addr->off;
116 void DEBUG_GetCurrentAddress( DBG_ADDR *addr )
119 addr->seg = DEBUG_context.SegCs;
121 if (DEBUG_IsSelectorSystem(addr->seg))
123 addr->off = DEBUG_context.Eip;
124 #elif defined(__sparc__)
126 addr->off = DEBUG_context.pc;
127 #elif defined(__powerpc__)
129 addr->off = DEBUG_context.Iar;
131 # error You must define GET_IP for this CPU
135 void DEBUG_InvalAddr( const DBG_ADDR* addr )
137 DEBUG_Printf(DBG_CHN_MESG,"*** Invalid address ");
138 DEBUG_PrintAddress(addr, DEBUG_CurrThread->dbg_mode, FALSE);
139 DEBUG_Printf(DBG_CHN_MESG,"\n");
140 if (DBG_IVAR(ExtDbgOnInvalidAddress)) DEBUG_ExternalDebugger();
143 void DEBUG_InvalLinAddr( void* addr )
148 address.off = (unsigned long)addr;
149 DEBUG_InvalAddr( &address );
152 /***********************************************************************
155 * Read a memory value.
157 /* FIXME: this function is now getting closer and closer to
158 * DEBUG_ExprGetValue. They should be merged...
160 int DEBUG_ReadMemory( const DBG_VALUE* val )
162 int value = 0; /* to clear any unused byte */
163 int os = DEBUG_GetObjectSize(val->type);
165 assert(sizeof(value) >= os);
167 /* FIXME: only works on little endian systems */
169 if (val->cookie == DV_TARGET) {
170 DBG_ADDR addr = val->addr;
174 DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
176 lin = (void*)DEBUG_ToLinear( &addr );
178 DEBUG_READ_MEM_VERBOSE(lin, &value, os);
181 memcpy(&value, (void*)val->addr.off, os);
187 /***********************************************************************
190 * Store a value in memory.
192 void DEBUG_WriteMemory( const DBG_VALUE* val, int value )
194 int os = DEBUG_GetObjectSize(val->type);
196 assert(sizeof(value) >= os);
198 /* FIXME: only works on little endian systems */
200 if (val->cookie == DV_TARGET) {
201 DBG_ADDR addr = val->addr;
205 DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
207 lin = (void*)DEBUG_ToLinear( &addr );
208 DEBUG_WRITE_MEM_VERBOSE(lin, &value, os);
210 memcpy((void*)val->addr.off, &value, os);
214 /***********************************************************************
217 * Get the address from a value
219 BOOL DEBUG_GrabAddress( DBG_VALUE* value, BOOL fromCode )
221 assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
224 DEBUG_FixAddress( &value->addr,
225 (fromCode) ? DEBUG_context.SegCs : DEBUG_context.SegDs);
229 * Dereference pointer to get actual memory address we need to be
230 * reading. We will use the same segment as what we have already,
231 * and hope that this is a sensible thing to do.
233 if (value->type != NULL) {
234 if (value->type == DEBUG_GetBasicType(DT_BASIC_CONST_INT)) {
236 * We know that we have the actual offset stored somewhere
237 * else in 32-bit space. Grab it, and we
240 unsigned int seg2 = value->addr.seg;
242 value->addr.off = DEBUG_GetExprValue(value, NULL);
243 value->addr.seg = seg2;
245 struct datatype * testtype;
247 if (DEBUG_TypeDerefPointer(value, &testtype) == 0)
249 if (testtype != NULL || value->type == DEBUG_GetBasicType(DT_BASIC_CONST_INT))
250 value->addr.off = DEBUG_GetExprValue(value, NULL);
252 } else if (!value->addr.seg && !value->addr.off) {
253 DEBUG_Printf(DBG_CHN_MESG,"Invalid expression\n");
259 /***********************************************************************
260 * DEBUG_ExamineMemory
262 * Implementation of the 'x' command.
264 void DEBUG_ExamineMemory( const DBG_VALUE *_value, int count, char format )
266 DBG_VALUE value = *_value;
270 if (!DEBUG_GrabAddress(&value, (format == 'i'))) return;
272 if (format != 'i' && count > 1)
274 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );
275 DEBUG_Printf(DBG_CHN_MESG,": ");
278 pnt = (void*)DEBUG_ToLinear( &value.addr );
283 if (count == 1) count = 256;
284 DEBUG_nchar += DEBUG_PrintStringW(DBG_CHN_MESG, &value.addr, count);
285 DEBUG_Printf(DBG_CHN_MESG, "\n");
288 if (count == 1) count = 256;
289 DEBUG_nchar += DEBUG_PrintStringA(DBG_CHN_MESG, &value.addr, count);
290 DEBUG_Printf(DBG_CHN_MESG, "\n");
293 while (count-- && DEBUG_DisassembleInstruction( &value.addr ));
299 if (!DEBUG_READ_MEM_VERBOSE(pnt, &guid, sizeof(guid))) break;
300 DEBUG_Printf(DBG_CHN_MESG,"{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\n",
301 guid.Data1, guid.Data2, guid.Data3,
302 guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
303 guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7] );
305 value.addr.off += sizeof(guid);
308 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );
309 DEBUG_Printf(DBG_CHN_MESG,": ");
314 #define DO_DUMP2(_t,_l,_f,_vv) { \
316 for(i=0; i<count; i++) { \
317 if (!DEBUG_READ_MEM_VERBOSE(pnt, &_v, sizeof(_t))) break; \
318 DEBUG_Printf(DBG_CHN_MESG,_f,(_vv)); \
319 pnt += sizeof(_t); value.addr.off += sizeof(_t); \
320 if ((i % (_l)) == (_l)-1) { \
321 DEBUG_Printf(DBG_CHN_MESG,"\n"); \
322 DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );\
323 DEBUG_Printf(DBG_CHN_MESG,": ");\
326 DEBUG_Printf(DBG_CHN_MESG,"\n"); \
329 #define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
331 case 'x': DO_DUMP(int, 4, " %8.8x");
332 case 'd': DO_DUMP(unsigned int, 4, " %10d");
333 case 'w': DO_DUMP(unsigned short, 8, " %04x");
334 case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
335 case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);
339 #define CHARBUFSIZE 16
341 /******************************************************************
344 * Prints on channel chnl, the string starting at address in target
345 * address space. The string stops when either len chars (if <> -1)
346 * have been printed, or the '\0' char is printed
348 int DEBUG_PrintStringA(int chnl, const DBG_ADDR* address, int len)
350 char* lin = (void*)DEBUG_ToLinear(address);
351 char ch[CHARBUFSIZE+1];
354 if (len == -1) len = 32767; /* should be big enough */
356 while (written < len)
358 int to_write = min(CHARBUFSIZE, len - written );
359 if (!DEBUG_READ_MEM_VERBOSE(lin, ch, to_write)) break;
360 ch[to_write] = '\0'; /* protect from displaying junk */
361 to_write = lstrlenA(ch);
362 DEBUG_OutputA(chnl, ch, to_write);
365 if (to_write < CHARBUFSIZE) break;
367 return written; /* number of actually written chars */
370 int DEBUG_PrintStringW(int chnl, const DBG_ADDR* address, int len)
372 char* lin = (void*)DEBUG_ToLinear(address);
373 WCHAR ch[CHARBUFSIZE+1];
376 if (len == -1) len = 32767; /* should be big enough */
378 while (written < len)
380 int to_write = min(CHARBUFSIZE, len - written );
381 if (!DEBUG_READ_MEM_VERBOSE(lin, ch, to_write * sizeof(WCHAR))) break;
382 ch[to_write] = 0; /* protect from displaying junk */
383 to_write = lstrlenW(ch);
384 DEBUG_OutputW(chnl, ch, to_write);
387 if (to_write < CHARBUFSIZE) break;
389 return written; /* number of actually written chars */