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330 lines
8.8 KiB
C
330 lines
8.8 KiB
C
/*
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* Debugger memory handling
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*
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* Copyright 1993 Eric Youngdale
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* Copyright 1995 Alexandre Julliard
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* Copyright 2000 Eric Pouech
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include "debugger.h"
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#include "winbase.h"
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#ifdef __i386__
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#define IS_VM86_MODE() (DEBUG_context.EFlags & V86_FLAG)
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#endif
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static void DEBUG_Die(const char* msg)
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{
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DEBUG_Printf(DBG_CHN_MESG, msg);
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exit(1);
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}
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void* DEBUG_XMalloc(size_t size)
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{
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void *res = malloc(size ? size : 1);
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if (res == NULL)
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DEBUG_Die("Memory exhausted.\n");
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memset(res, 0, size);
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return res;
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}
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void* DEBUG_XReAlloc(void *ptr, size_t size)
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{
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void* res = realloc(ptr, size);
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if ((res == NULL) && size)
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DEBUG_Die("Memory exhausted.\n");
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return res;
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}
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char* DEBUG_XStrDup(const char *str)
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{
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char *res = strdup(str);
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if (!res)
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DEBUG_Die("Memory exhausted.\n");
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return res;
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}
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enum dbg_mode DEBUG_GetSelectorType( WORD sel )
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{
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#ifdef __i386__
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LDT_ENTRY le;
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if (IS_VM86_MODE()) return MODE_VM86;
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if (sel == 0) return MODE_32;
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if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, sel, &le))
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return le.HighWord.Bits.Default_Big ? MODE_32 : MODE_16;
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/* selector doesn't exist */
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return MODE_INVALID;
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#else
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return MODE_32;
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#endif
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}
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#ifdef __i386__
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void DEBUG_FixAddress( DBG_ADDR *addr, DWORD def)
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{
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if (addr->seg == 0xffffffff) addr->seg = def;
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if (DEBUG_IsSelectorSystem(addr->seg)) addr->seg = 0;
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}
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/* Determine if sel is a system selector (i.e. not managed by Wine) */
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BOOL DEBUG_IsSelectorSystem(WORD sel)
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{
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if (IS_VM86_MODE()) return FALSE; /* no system selectors in vm86 mode */
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return !(sel & 4) || ((sel >> 3) < 17);
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}
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#endif /* __i386__ */
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DWORD DEBUG_ToLinear( const DBG_ADDR *addr )
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{
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#ifdef __i386__
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LDT_ENTRY le;
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if (IS_VM86_MODE()) return (DWORD)(LOWORD(addr->seg) << 4) + addr->off;
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if (DEBUG_IsSelectorSystem(addr->seg))
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return addr->off;
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if (GetThreadSelectorEntry( DEBUG_CurrThread->handle, addr->seg, &le)) {
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return (le.HighWord.Bits.BaseHi << 24) + (le.HighWord.Bits.BaseMid << 16) + le.BaseLow + addr->off;
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}
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return 0;
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#else
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return addr->off;
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#endif
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}
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void DEBUG_GetCurrentAddress( DBG_ADDR *addr )
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{
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#ifdef __i386__
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addr->seg = DEBUG_context.SegCs;
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if (DEBUG_IsSelectorSystem(addr->seg))
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addr->seg = 0;
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addr->off = DEBUG_context.Eip;
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#elif defined(__sparc__)
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addr->seg = 0;
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addr->off = DEBUG_context.pc;
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#else
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# error You must define GET_IP for this CPU
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#endif
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}
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void DEBUG_InvalAddr( const DBG_ADDR* addr )
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{
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DEBUG_Printf(DBG_CHN_MESG,"*** Invalid address ");
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DEBUG_PrintAddress(addr, DEBUG_CurrThread->dbg_mode, FALSE);
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DEBUG_Printf(DBG_CHN_MESG,"\n");
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if (DBG_IVAR(ExtDbgOnInvalidAddress)) DEBUG_ExternalDebugger();
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}
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void DEBUG_InvalLinAddr( void* addr )
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{
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DBG_ADDR address;
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address.seg = 0;
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address.off = (unsigned long)addr;
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DEBUG_InvalAddr( &address );
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}
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/***********************************************************************
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* DEBUG_ReadMemory
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*
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* Read a memory value.
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*/
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/* FIXME: this function is now getting closer and closer to
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* DEBUG_ExprGetValue. They should be merged...
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*/
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int DEBUG_ReadMemory( const DBG_VALUE* val )
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{
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int value = 0; /* to clear any unused byte */
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int os = DEBUG_GetObjectSize(val->type);
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assert(sizeof(value) >= os);
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/* FIXME: only works on little endian systems */
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if (val->cookie == DV_TARGET) {
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DBG_ADDR addr = val->addr;
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void* lin;
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#ifdef __i386__
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DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
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#endif
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lin = (void*)DEBUG_ToLinear( &addr );
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DEBUG_READ_MEM_VERBOSE(lin, &value, os);
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} else {
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if (val->addr.off)
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memcpy(&value, (void*)val->addr.off, os);
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}
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return value;
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}
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/***********************************************************************
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* DEBUG_WriteMemory
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*
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* Store a value in memory.
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*/
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void DEBUG_WriteMemory( const DBG_VALUE* val, int value )
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{
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int os = DEBUG_GetObjectSize(val->type);
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assert(sizeof(value) >= os);
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/* FIXME: only works on little endian systems */
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if (val->cookie == DV_TARGET) {
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DBG_ADDR addr = val->addr;
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void* lin;
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#ifdef __i386__
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DEBUG_FixAddress( &addr, DEBUG_context.SegDs );
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#endif
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lin = (void*)DEBUG_ToLinear( &addr );
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DEBUG_WRITE_MEM_VERBOSE(lin, &value, os);
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} else {
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memcpy((void*)val->addr.off, &value, os);
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}
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}
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/***********************************************************************
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* DEBUG_GrabAddress
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*
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* Get the address from a value
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*/
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BOOL DEBUG_GrabAddress( DBG_VALUE* value, BOOL fromCode )
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{
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assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
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#ifdef __i386__
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DEBUG_FixAddress( &value->addr,
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(fromCode) ? DEBUG_context.SegCs : DEBUG_context.SegDs);
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#endif
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/*
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* Dereference pointer to get actual memory address we need to be
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* reading. We will use the same segment as what we have already,
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* and hope that this is a sensible thing to do.
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*/
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if (value->type != NULL) {
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if (value->type == DEBUG_GetBasicType(DT_BASIC_CONST_INT)) {
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/*
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* We know that we have the actual offset stored somewhere
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* else in 32-bit space. Grab it, and we
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* should be all set.
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*/
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unsigned int seg2 = value->addr.seg;
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value->addr.seg = 0;
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value->addr.off = DEBUG_GetExprValue(value, NULL);
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value->addr.seg = seg2;
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} else {
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struct datatype * testtype;
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if (DEBUG_TypeDerefPointer(value, &testtype) == 0)
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return FALSE;
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if (testtype != NULL || value->type == DEBUG_GetBasicType(DT_BASIC_CONST_INT))
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value->addr.off = DEBUG_GetExprValue(value, NULL);
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}
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} else if (!value->addr.seg && !value->addr.off) {
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DEBUG_Printf(DBG_CHN_MESG,"Invalid expression\n");
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return FALSE;
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}
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return TRUE;
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}
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/***********************************************************************
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* DEBUG_ExamineMemory
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*
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* Implementation of the 'x' command.
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*/
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void DEBUG_ExamineMemory( const DBG_VALUE *_value, int count, char format )
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{
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DBG_VALUE value = *_value;
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int i;
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unsigned char * pnt;
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if (!DEBUG_GrabAddress(&value, (format == 'i'))) return;
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if (format != 'i' && count > 1)
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{
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DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );
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DEBUG_Printf(DBG_CHN_MESG,": ");
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}
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pnt = (void*)DEBUG_ToLinear( &value.addr );
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switch(format)
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{
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case 'u': {
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WCHAR wch;
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if (count == 1) count = 256;
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while (count--)
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{
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if (!DEBUG_READ_MEM_VERBOSE(pnt, &wch, sizeof(wch)) || !wch)
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break;
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pnt += sizeof(wch);
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DEBUG_Printf(DBG_CHN_MESG, "%c", (char)wch);
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}
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DEBUG_Printf(DBG_CHN_MESG,"\n");
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return;
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}
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case 's': {
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char ch;
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if (count == 1) count = 256;
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while (count--)
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{
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if (!DEBUG_READ_MEM_VERBOSE(pnt, &ch, sizeof(ch)) || !ch)
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break;
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pnt++;
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DEBUG_Output(DBG_CHN_MESG, &ch, 1);
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}
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DEBUG_Printf(DBG_CHN_MESG,"\n");
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return;
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}
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case 'i':
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while (count-- && DEBUG_DisassembleInstruction( &value.addr ));
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return;
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#define DO_DUMP2(_t,_l,_f,_vv) { \
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_t _v; \
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for(i=0; i<count; i++) { \
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if (!DEBUG_READ_MEM_VERBOSE(pnt, &_v, sizeof(_t))) break; \
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DEBUG_Printf(DBG_CHN_MESG,_f,(_vv)); \
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pnt += sizeof(_t); value.addr.off += sizeof(_t); \
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if ((i % (_l)) == (_l)-1) { \
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DEBUG_Printf(DBG_CHN_MESG,"\n"); \
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DEBUG_PrintAddress( &value.addr, DEBUG_CurrThread->dbg_mode, FALSE );\
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DEBUG_Printf(DBG_CHN_MESG,": ");\
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} \
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} \
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DEBUG_Printf(DBG_CHN_MESG,"\n"); \
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} \
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return
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#define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
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case 'x': DO_DUMP(int, 4, " %8.8x");
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case 'd': DO_DUMP(unsigned int, 4, " %10d");
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case 'w': DO_DUMP(unsigned short, 8, " %04x");
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case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v);
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case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff);
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}
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}
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