/*
* horkyFindSegment:
*
* runs and tries to find a segment. It does this by finding the module
* entry in the global heap for this task. The module entry is a lot like
* an NE header, except that instead of segment numbers, it has the selector
* values themselves. We pass the module entry to accessSegment, who looks
* up the selector and causes it to load.
*
* The reason: load on call segments are not identified by toolhelp,
* so mapaddrs for those segments would fail without this putrid code.
* As well, the segments themselves are not always loaded (loadoncall
* segments), so if you were to look at the memory there, you would see
* nothing.
*
* Special note: this only works for the task that you are debugging.
* Windows knows what the current task is, and when you access a not present
* segment, it tries to load the segment based on the current task. Thus,
* you cannot try to have the debugee fault in a segment belonging to some
* other task. Why DLL's work at all (since they are not a "task") is beyond
* me.
*/
static BOOL horkyFindSegment( int module, WORD segment )
{
static GLOBALENTRY ge;
static HMODULE lastmodid;
HMODULE modid;
modid = moduleIDs[ module ];
if( !moduleIsDLL[ module ] ) {
return( FALSE );
}
if( lastmodid == modid ) {
accessSegment( ge.hBlock, segment );
return( TRUE );
}
lastmodid = modid;
ge.dwSize = sizeof( ge );
if( !GlobalFirst( &ge, GLOBAL_ALL ) ) {
lastmodid = NULL;
return( FALSE );
}
do {
if( ge.hOwner == modid && ge.wType == GT_MODULE ) {
accessSegment( ge.hBlock, segment );
return( TRUE );
}
ge.dwSize = sizeof( ge );
} while( GlobalNext( &ge, GLOBAL_ALL ) );
lastmodid = NULL;
return( FALSE );
} /* horkyFindSegment */
/*
* horkyFindSegment - runs and tries to find a segment. load on call
* segments are not identified by toolhelp,
* so mapaddrs for those segments would fail with
* out this putrid code.
*/
static WORD horkyFindSegment( HMODULE modid, WORD segment )
{
static GLOBALENTRY ge;
static HMODULE lastmodid;
if( lastmodid == modid ) {
return( accessSegment( ge.hBlock, segment ) );
}
lastmodid = modid;
ge.dwSize = sizeof( ge );
if( !MyGlobalFirst( &ge, GLOBAL_ALL ) ) {
lastmodid = NULL;
return( 0 );
}
do {
if( ge.hOwner == modid && ge.wType == GT_MODULE ) {
return( accessSegment( ge.hBlock, segment ) );
}
ge.dwSize = sizeof( ge );
} while( MyGlobalNext( &ge, GLOBAL_ALL ) );
lastmodid = NULL;
return( 0 );
} /* horkyFindSegment */
