reactos/lib/rossym/fromraw.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            lib/rossym/frommem.c
   5  * PURPOSE:         Creating rossym info from an in-memory image
   6  *
   7  * PROGRAMMERS:     Ge van Geldorp (gvg@reactos.com)
   8  */
   9
  10 #define NTOSAPI
  11 #include <ntddk.h>
  12 #include <reactos/rossym.h>
  13 #include "rossympriv.h"
  14
  15 #define NDEBUG
  16 #include <debug.h>
  17
  18 BOOLEAN
  19 RosSymCreateFromRaw(PVOID RawData, ULONG_PTR DataSize, PROSSYM_INFO *RosSymInfo)
  20 {
  21   PROSSYM_HEADER RosSymHeader;
  22
  23   RosSymHeader = (PROSSYM_HEADER) RawData;
  24   if (RosSymHeader->SymbolsOffset < sizeof(ROSSYM_HEADER)
  25       || RosSymHeader->StringsOffset < RosSymHeader->SymbolsOffset + RosSymHeader->SymbolsLength
  26       || DataSize < RosSymHeader->StringsOffset + RosSymHeader->StringsLength
  27       || 0 != (RosSymHeader->SymbolsLength % sizeof(ROSSYM_ENTRY)))
  28     {
  29       DPRINT1("Invalid ROSSYM_HEADER\n");
  30       return FALSE;
  31     }
  32
  33   /* Copy */
  34   *RosSymInfo = RosSymAllocMem(sizeof(ROSSYM_INFO) + RosSymHeader->SymbolsLength
  35                                + RosSymHeader->StringsLength + 1);
  36   if (NULL == *RosSymInfo)
  37     {
  38       DPRINT1("Failed to allocate memory for rossym\n");
  39       return FALSE;
  40     }
  41   (*RosSymInfo)->Symbols = (PROSSYM_ENTRY)((char *) *RosSymInfo + sizeof(ROSSYM_INFO));
  42   (*RosSymInfo)->SymbolsCount = RosSymHeader->SymbolsLength / sizeof(ROSSYM_ENTRY);
  43   (*RosSymInfo)->Strings = (PCHAR) *RosSymInfo + sizeof(ROSSYM_INFO) + RosSymHeader->SymbolsLength;
  44   (*RosSymInfo)->StringsLength = RosSymHeader->StringsLength;
  45   memcpy((*RosSymInfo)->Symbols, (char *) RosSymHeader + RosSymHeader->SymbolsOffset,
  46          RosSymHeader->SymbolsLength);
  47   memcpy((*RosSymInfo)->Strings, (char *) RosSymHeader + RosSymHeader->StringsOffset,
  48          RosSymHeader->StringsLength);
  49   /* Make sure the last string is null terminated, we allocated an extra byte for that */
  50   (*RosSymInfo)->Strings[(*RosSymInfo)->StringsLength] = '\0';
  51
  52   return TRUE;
  53 }
  54
  55 /* EOF */