dlls/dbghelp/memory.c

   1 /*
   2  * File memory.c - managing memory
   3  *
   4  * Copyright (C) 2004, Eric Pouech
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <assert.h>
  24 #include "dbghelp_private.h"
  25 #include "wine/debug.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  28
  29 BOOL        win32_read_mem(HANDLE hProcess, DWORD addr, void* buf, DWORD len)
  30 {
  31     return ReadProcessMemory(hProcess, (void*)addr, buf, len, NULL);
  32 }
  33
  34 BOOL        win32_write_mem(HANDLE hProcess, DWORD addr, void* buf, DWORD len)
  35 {
  36     return WriteProcessMemory(hProcess, (void*)addr, buf, len, NULL);
  37 }
  38
  39 /* standard routines for reading / writing memory. Can be overriden for some
  40  * minidump usage
  41  */
  42 struct memory_access mem_access = {win32_read_mem, win32_write_mem};
  43
  44 /******************************************************************
  45  *              addr_to_linear
  46  *
  47  * converts an address into its linear value
  48  */
  49 DWORD WINAPI addr_to_linear(HANDLE hProcess, HANDLE hThread, ADDRESS* addr)
  50 {
  51     LDT_ENTRY   le;
  52
  53     switch (addr->Mode)
  54     {
  55     case AddrMode1616:
  56         if (GetThreadSelectorEntry(hThread, addr->Segment, &le))
  57             return (le.HighWord.Bits.BaseHi << 24) +
  58                 (le.HighWord.Bits.BaseMid << 16) + le.BaseLow + LOWORD(addr->Offset);
  59         break;
  60     case AddrMode1632:
  61         if (GetThreadSelectorEntry(hThread, addr->Segment, &le))
  62             return (le.HighWord.Bits.BaseHi << 24) +
  63                 (le.HighWord.Bits.BaseMid << 16) + le.BaseLow + addr->Offset;
  64         break;
  65     case AddrModeReal:
  66         return (DWORD)(LOWORD(addr->Segment) << 4) + addr->Offset;
  67     case AddrModeFlat:
  68         return addr->Offset;
  69     default:
  70         FIXME("Unsupported (yet) mode (%x)\n", addr->Mode);
  71         return 0;
  72     }
  73     FIXME("Failed to linearize address %04x:%08lx (mode %x)\n",
  74           addr->Segment, addr->Offset, addr->Mode);
  75     return 0;
  76 }