void PurgeSymbols( void )
/******************************/
{
symbol ** list;
symbol * sym;
WalkHashTables( PurgeHashTable );
WalkHashTables( CleanupOldAltdefs );
list = &HeadSym;
while( *list != NULL ) {
sym = *list;
if( sym->info & SYM_KILL ) {
*list = sym->link;
FreeSymbol( sym );
} else if( sym->info & SYM_IS_ALTDEF ) {
*list = sym->link; // gonna get rid of these later
} else {
if( IS_SYM_ALIAS(sym) && sym->info & SYM_WAS_LAZY ) {
WipeSym( sym );
sym->info = SYM_WEAK_REF | SYM_REFERENCED;
}
LastSym = sym;
list = &(*list)->link;
}
}
}
void MakeSymAlias( char *name, size_t namelen, char *target, size_t targetlen )
/*****************************************************************************/
/* make a symbol table alias */
{
symbol *sym;
symbol *targ;
if( namelen == targetlen && (*CmpRtn)( name, target, namelen ) == 0 ) {
char *buff;
buff = alloca( targetlen + 1 );
memcpy( buff, target, targetlen );
buff[ targetlen ] = '\0';
LnkMsg( WRN+MSG_CIRCULAR_ALIAS_FOUND, "s", buff );
return; // <--------- NOTE: premature return!!!!
}
sym = SymOp( ST_CREATE | ST_NOALIAS, name, namelen );
if( IS_SYM_ALIAS( sym ) ) {
LnkMsg( WRN+MSG_MULTIPLE_ALIASES, "S", sym );
if( sym->info & SYM_FREE_ALIAS ) {
_LnkFree( sym->p.alias );
}
} else if( sym->info & SYM_DEFINED ) {
return; // <--------- NOTE: premature return!!!!
}
sym->info |= SYM_FREE_ALIAS;
/*
* need to defined aliased symbol as well, so aliases in .obj files can be
* hauled in from libraries
*/
targ = SymOp( ST_CREATE, target, targetlen );
SetSymAlias( sym, targ->name, targetlen );
}
static void MarkDefaultSyms( void )
/*********************************/
{
symbol *sym;
for( sym = HeadSym; sym != NULL; sym = sym->link ) {
if( IS_SYM_ALIAS( sym ) && (sym->info & SYM_WAS_LAZY) ) {
sym->e.def->info |= SYM_RELOC_REFD;
}
}
}
symbol *UnaliasSym( sym_flags op, symbol *sym )
/*****************************************************/
{
symbol *orig_sym = sym;
while( sym != NULL && IS_SYM_ALIAS(sym) ) {
sym = DoSymOp( op, sym->p.alias, sym->u.aliaslen );
/* circular ref, may be a weak symbol ! */
if( sym == orig_sym ) {
break;
}
}
return( sym );
}
static void PrepSymbol( void *_sym, void *info )
/**********************************************/
{
symbol *sym = _sym;
char *save;
symbol *mainsym;
if( sym->info & SYM_IS_FREE ) {
*((unsigned_32 *)sym) = CARVE_INVALID_INDEX;
return;
}
sym->hash = CarveGetIndex( CarveSymbol, sym->hash );
sym->link = CarveGetIndex( CarveSymbol, sym->link );
sym->publink = CarveGetIndex( CarveSymbol, sym->publink );
if( sym->info & SYM_IS_ALTDEF ) {
mainsym = sym->e.mainsym;
if( !(mainsym->info & SYM_NAME_XLATED) ) {
mainsym->name = GetString( info, mainsym->name );
mainsym->info |= SYM_NAME_XLATED;
}
sym->name = mainsym->name;
} else if( !(sym->info & SYM_NAME_XLATED) ) {
sym->name = GetString( info, sym->name );
sym->info |= SYM_NAME_XLATED;
}
sym->mod = CarveGetIndex( CarveModEntry, sym->mod );
if( IS_SYM_ALIAS( sym ) ) {
save = sym->p.alias;
sym->p.alias = GetString( info, sym->p.alias );
if( sym->info & SYM_FREE_ALIAS ) {
_LnkFree( save );
}
} else if( IS_SYM_IMPORTED(sym) ) {
if( FmtData.type & (MK_OS2 | MK_PE) ) {
sym->p.import = CarveGetIndex( CarveDLLInfo, sym->p.import );
}
} else if( !(sym->info & SYM_IS_ALTDEF) || IS_SYM_COMDAT(sym) ) {
sym->p.seg = CarveGetIndex( CarveSegData, sym->p.seg );
sym->u.altdefs = CarveGetIndex( CarveSymbol, sym->u.altdefs );
}
if( sym->info & SYM_EXPORTED ) {
if( FmtData.type & (MK_OS2 | MK_PE | MK_WIN_VXD) ) {
sym->e.export = CarveGetIndex( CarveExportInfo, sym->e.export );
}
} else if( sym->e.def != NULL ) {
static void WipeSym( symbol *sym )
/********************************/
{
if( IS_SYM_IMPORTED(sym) && !(FmtData.type & MK_ELF) ) {
if( FmtData.type & MK_NOVELL ) {
if( sym->p.import != DUMMY_IMPORT_PTR ) {
_LnkFree( sym->p.import );
}
} else {
FreeImport( sym->p.import );
}
sym->p.import = NULL;
} else if( IS_SYM_ALIAS(sym) ) {
if( sym->info & SYM_FREE_ALIAS ) {
_LnkFree( sym->p.alias );
}
sym->u.aliaslen = 0; // make sure this is nulled again
}
}
static void CleanAltDefs( symbol *sym )
/*************************************/
{
symbol * testring;
symbol * altsym;
if( IS_SYM_ALIAS( sym ) || sym->info & SYM_DEAD || sym->u.altdefs == NULL )
return;
testring = NULL;
while( (altsym = RingPop( &sym->u.altdefs)) != NULL ) {
if( altsym->info & SYM_KILL ) {
if( altsym->info & SYM_HAS_DATA ) {
altsym->u.datasym = NULL;
RingAppend( &testring, altsym );
}
} else if( !(altsym->info & SYM_HAS_DATA) ) {
RingLookup( testring, SetNewDataSym, altsym );
}
}
}
group_entry *SymbolGroup( symbol *sym )
/********************************************/
{
group_entry *group;
if( IS_SYM_ALIAS(sym) ) {
group = NULL;
} else if( IS_SYM_GROUP(sym) ) {
for( group = Groups; group != NULL; group = group->next_group ) {
if( sym == group->sym ) {
break;
}
}
} else {
if( sym->p.seg != NULL ) {
group = sym->p.seg->u.leader->group;
} else {
group = NULL;
}
}
return group;
}
symbol *SymOp( sym_flags op, char *symname, size_t length )
/*********************************************************/
/* search for symbols, handling aliases */
{
symbol * sym;
sym = DoSymOp( op, symname, length );
if( !(op & ST_NOALIAS) ) {
sym = UnaliasSym( op, sym );
}
if( sym != NULL ) {
if( op & ST_DEFINE ) {
if( IS_SYM_ALIAS( sym ) && sym->info & SYM_FREE_ALIAS ) {
_LnkFree( sym->p.alias );
sym->info &= ~SYM_FREE_ALIAS;
}
sym->info |= SYM_DEFINED;
}
if( op & ST_REFERENCE ) {
sym->info |= SYM_REFERENCED;
}
}
return( sym );
}
