// This function is a hack to get symbols loaded for
// dlls. The function FFinishImageLoad internally allocates
// memory which is/can never be freed. And the dll can not be
// unloaded.
void DllLoader::LoadSymbols()
{
#ifdef ENABLE_SYMBOL_LOADING
if (!m_bLoadSymbols ) return;
// don't load debug symbols unless we have a debugger present
// seems these calls break on some bioses. i suppose it could
// be related to if the bios has debug capabilities.
if (!DmIsDebuggerPresent())
{
m_bLoadSymbols=false;
return;
}
LPVOID pBaseAddress=GetXbdmBaseAddress();
if (pBaseAddress)
{
CoffLoader dllxbdm;
if (dllxbdm.ParseHeaders(pBaseAddress))
{
int offset=GetFFinishImageLoadOffset(dllxbdm.WindowsHeader->CheckSum);
if (offset==0)
{
CLog::Log(LOGDEBUG,"DllLoader: Unable to load symbols for %s. No offset for xbdm.dll with checksum 0x%08X found", GetName(), dllxbdm.WindowsHeader->CheckSum);
return;
}
// Get a function pointer to the unexported function FFinishImageLoad
fnFFinishImageLoad FFinishImageLoad=(fnFFinishImageLoad)((LPBYTE)pBaseAddress+offset);
// Prepare parameter for the function call
LDR_DATA_TABLE_ENTRY ldte;
LPLDR_DATA_TABLE_ENTRY pldteout;
ldte.DllBase=hModule; // Address where this dll is loaded into memory
char* szName=GetName(); // Name of this dll without path
try
{
// Call FFinishImageLoad to register this dll to the debugger and load its symbols.
FFinishImageLoad(&ldte, szName, &pldteout);
}
catch(...)
{
CLog::Log(LOGDEBUG,"DllLoader: Loading symbols for %s failed with an exception.", GetName());
}
}
}
else
CLog::Log(LOGDEBUG,"DllLoader: Can't load symbols for %s. xbdm.dll is needed and not loaded", GetName());
#ifdef ENABLE_SYMBOL_UNLOADING
m_bUnloadSymbols=true; // Do this to allow unloading this dll from dllloadercontainer
#endif
#else
m_bLoadSymbols=false;
#endif
}
bool lzham_is_debugger_present(void)
{
#if LZHAM_PLATFORM_X360
return DmIsDebuggerPresent() != 0;
#elif LZHAM_USE_WIN32_API
return IsDebuggerPresent() != 0;
#else
return false;
#endif
}
bool CXboxConsole::IsDebuggerPresent()
{
return ( DmIsDebuggerPresent() != 0 );
}
