diff --git a/mach/m68020/ce/EM_table b/mach/m68020/ce/EM_table
index e5d8c74e8..099cbe3a9 100644
--- a/mach/m68020/ce/EM_table
+++ b/mach/m68020/ce/EM_table
@@ -881,3 +881,5 @@ C_prolog		==>	.
 C_jump	 		==>	"bra $1".
 
 C_locals		==>	"link a6, #-$1".
+
+C_db_sline		==>	"jsr (___u_LiB)".
diff --git a/mach/vax4/ce/EM_table b/mach/vax4/ce/EM_table
index 1c2194cfa..d7972b133 100644
--- a/mach/vax4/ce/EM_table
+++ b/mach/vax4/ce/EM_table
@@ -777,3 +777,5 @@ C_locals
   $1 == 4       ==>             "clrq -(sp)".
   $1 == 8       ==>             "clrq -(sp)".
   default	==>		"subl2 ~$1, sp".
+
+C_db_sline	==>		"calls ~0, ___u_LiB".
diff --git a/util/ceg/EM_parser/common/C_instr2.c b/util/ceg/EM_parser/common/C_instr2.c
index bd85a5401..19281bd49 100644
--- a/util/ceg/EM_parser/common/C_instr2.c
+++ b/util/ceg/EM_parser/common/C_instr2.c
@@ -145,7 +145,7 @@ t_C_info C_info[] = {
 			       { "str", 0, 0, 0}}
 		     }, *C_instr_info;
 
-#define N_INSTR	269
+#define N_INSTR	270
 
 struct { char *name; int class, segment;}
 		EM_instr[ N_INSTR ] = {
@@ -220,6 +220,7 @@ struct { char *name; int class, segment;}
 				{ "C_cuf", NO_ARGS, SEGTXT},
 				{ "C_cui", NO_ARGS, SEGTXT},
 				{ "C_cuu", NO_ARGS, SEGTXT},
+				{ "C_db_sline", NO_ARGS, SEGTXT},
 				{ "C_dch", NO_ARGS, SEGTXT},
 				{ "C_dec", NO_ARGS, SEGTXT},
 				{ "C_dee", EXTERNAL, SEGTXT},
diff --git a/util/ceg/ce_back/as_back/.distr b/util/ceg/ce_back/as_back/.distr
index 65edd256c..fbc0bdb4e 100644
--- a/util/ceg/ce_back/as_back/.distr
+++ b/util/ceg/ce_back/as_back/.distr
@@ -27,3 +27,4 @@ symboldef.c
 text1.c
 text2.c
 text4.c
+dbsym.c
diff --git a/util/ceg/ce_back/as_back/dbsym.c b/util/ceg/ce_back/as_back/dbsym.c
new file mode 100644
index 000000000..c18448de8
--- /dev/null
+++ b/util/ceg/ce_back/as_back/dbsym.c
@@ -0,0 +1,26 @@
+#include "header.h"
+
+#ifndef OWN_SYMB
+B_symbstr(s, len, type, add, val, added)
+char *s, *val;
+arith added;
+{
+	if (! s) s = "";
+	fprint(codefile, ".symb \"%s\", %s+%ld, 0x%x, %d\n", s, val, (long) added, type, add);
+}
+
+B_symbcst(s, len, type, add, val)
+char *s;
+arith val;
+{
+	if (! s) s = "";
+	fprint(codefile, ".symb \"%s\", %ld, 0x%x, %d\n", s, val, type, add);
+}
+
+B_symd(s, len, type, add)
+char *s;
+{
+	if (! s) s = "";
+	fprint(codefile, ".symd \"%s\", 0x%x, %d\n", s, type, add);
+}
+#endif
diff --git a/util/ceg/ce_back/as_back/proto.make b/util/ceg/ce_back/as_back/proto.make
index 265b0c034..31b4ce71a 100644
--- a/util/ceg/ce_back/as_back/proto.make
+++ b/util/ceg/ce_back/as_back/proto.make
@@ -17,7 +17,7 @@ all:	bottom.$(SUF) con1.$(SUF) con2.$(SUF) con4.$(SUF) end_back.$(SUF) \
 	reloc2.$(SUF) reloc4.$(SUF) bss.$(SUF) rom1.$(SUF) rom2.$(SUF) \
 	rom4.$(SUF) set_global.$(SUF) set_local.$(SUF) switchseg.$(SUF) \
 	symboldef.$(SUF) do_open.$(SUF) do_close.$(SUF) text1.$(SUF) \
-	text2.$(SUF) text4.$(SUF)
+	text2.$(SUF) text4.$(SUF) dbsym.$(SUF)
 
 bottom.$(SUF) : $(SRC_DIR)/mach.h back.h header.h $(SOURCE)/bottom.c
 	$(CC) $(CFLAGS) -c $(SOURCE)/bottom.c
@@ -93,3 +93,6 @@ switchseg.$(SUF) : header.h back.h $(SRC_DIR)/mach.h $(SOURCE)/switchseg.c
 
 symboldef.$(SUF) : header.h back.h $(SRC_DIR)/mach.h $(SOURCE)/symboldef.c
 	$(CC) $(CFLAGS) -c $(SOURCE)/symboldef.c
+
+dbsym.$(SUF) : header.h back.h $(SRC_DIR)/mach.h $(SOURCE)/dbsym.c
+	$(CC) $(CFLAGS) -c $(SOURCE)/dbsym.c
diff --git a/util/ceg/ce_back/obj_back/.distr b/util/ceg/ce_back/obj_back/.distr
index 4d503dcc9..cd700c6ed 100644
--- a/util/ceg/ce_back/obj_back/.distr
+++ b/util/ceg/ce_back/obj_back/.distr
@@ -33,3 +33,4 @@ symtable.c
 text2.c
 text4.c
 common.c
+dbsym.c
diff --git a/util/ceg/ce_back/obj_back/extnd.c b/util/ceg/ce_back/obj_back/extnd.c
index 221fb086f..2fda33b83 100644
--- a/util/ceg/ce_back/obj_back/extnd.c
+++ b/util/ceg/ce_back/obj_back/extnd.c
@@ -77,9 +77,9 @@ char *s;
 
 
 char *extnd_dlb( g)
-arith g;
+label g;
 {
-	string_lengte = mysprint( DLB_FMT, (arith)g);
+	string_lengte = mysprint( DLB_FMT, (long)g);
         index_symbol_table = find_sym( string, STORE_STRING);
 	return( symbol_table[ index_symbol_table].on_foff + string_area);
 }
@@ -88,7 +88,7 @@ arith g;
 char *extnd_ilb( l, prcno)
 arith l;
 {
-	string_lengte = mysprint( ILB_FMT, prcno, (arith) l);
+	string_lengte = mysprint( ILB_FMT, prcno, (long) l);
         index_symbol_table = find_sym( string, STORE_STRING);
 	return( symbol_table[ index_symbol_table].on_foff + string_area);
 }
diff --git a/util/ceg/ce_back/obj_back/header.h b/util/ceg/ce_back/obj_back/header.h
index a63379409..f48ca3f23 100644
--- a/util/ceg/ce_back/obj_back/header.h
+++ b/util/ceg/ce_back/obj_back/header.h
@@ -3,5 +3,6 @@
 #define SYMBOL_DEFINITION	1
 #define REFERENCE		2
 #define STORE_STRING		3
+#define FORCE_DEF		4
 
 #define conv_seg( s)	( ( s == SEGROM) ? SEGCON : s)
diff --git a/util/ceg/ce_back/obj_back/output.c b/util/ceg/ce_back/obj_back/output.c
index 57a581000..0bf5947ba 100644
--- a/util/ceg/ce_back/obj_back/output.c
+++ b/util/ceg/ce_back/obj_back/output.c
@@ -17,7 +17,7 @@ output_back()
 {
 	struct outhead header;
 	struct outsect sect;
-        long 	ntext = text - text_area, 
+        long	ntext = text - text_area, 
 		ndata = data - data_area,
 		nchar;
 
@@ -94,12 +94,13 @@ reduce_name_table()
 	 * After that, the string table is reduced.
 	 */
 
-#define S_NEEDED	0x8000
-#define removable(nm)	(!(nm.on_type & S_NEEDED) && *(nm.on_foff+string_area) == GENLAB)
+#define S_NEEDED S_MOD
+#define removable(nm)	(!(nm->on_type & (S_NEEDED|S_STB)) && *(nm->on_foff+string_area) == GENLAB)
 
 	register int *diff_index =
 		(int *) Malloc((unsigned)(nname + 1) * sizeof(int));
 	register struct outrelo *rp = reloc_info;
+	register struct outname *np;
 	register int i;
 	char *new_str;
 	register char *p, *q;
@@ -113,22 +114,31 @@ reduce_name_table()
 		rp++;
 	}
 
-	for (i = 0; i < nname; i++) {
+	for (i = 0, np = symbol_table; i < nname; i++, np++) {
 		diff_index[i] = diff_index[i-1];
-		if (removable(symbol_table[i])) {
+		if (removable(np)) {
 			diff_index[i]++;
 		}
+		if ((np->on_type & S_TYP) == S_CRS) {
+			struct outname *n = &symbol_table[(int) np->on_valu];
+			if (! (n->on_type & S_COM)) {
+				np->on_type &= ~S_TYP;
+				np->on_type |= (n->on_type & S_TYP);
+				np->on_valu = n->on_valu;
+			}
+		}
 	}
 
 	rp = reloc_info;
 	for (i = 0; i < nrelo; i++) {
+		symbol_table[rp->or_nami].on_type &= ~S_NEEDED;
 		rp->or_nami -= diff_index[rp->or_nami];
 		rp++;
 	}
-	for (i = 0; i < nname; i++) {
-		register struct outname *np = &symbol_table[i];
-
-		np->on_type &= ~S_NEEDED;
+	for (i = 0, np = symbol_table; i < nname; i++, np++) {
+		if ((np->on_type & S_TYP) == S_CRS) {
+			np->on_valu -= diff_index[(int) np->on_valu];
+		}
 		if (diff_index[i] && diff_index[i] == diff_index[i-1]) {
 			symbol_table[i - diff_index[i]] = *np;
 		}
@@ -138,14 +148,20 @@ reduce_name_table()
 	free((char *)(diff_index-1));
 
 	new_str = q = Malloc((unsigned)(string - string_area));
-	for (i = 0; i < nname; i++) {
-		p = symbol_table[i].on_foff + string_area;
-		symbol_table[i].on_foff = q - new_str;
+	for (i = 0, np = symbol_table; i < nname; i++, np++) {
+		p = np->on_foff + string_area;
+		np->on_foff = q - new_str;
 		while (*q++ = *p) p++;
 	}
 	free(string_area);
 	string_area = new_str;
 	string = q;
+	for (i = 0, np = symbol_table; i < nname; i++, np++) {
+		if ((np->on_type & S_TYP) == S_CRS) {
+			/* replace by reference to string */
+			np->on_valu = symbol_table[(int) np->on_valu].on_foff;
+		}
+	}
 }
 
 wr_fatal()
@@ -159,11 +175,14 @@ static
 convert_outname( header)
 struct outhead *header;
 {
-    int i;
+	int i;
+	register struct outname *np;
+	register long l = OFF_CHAR(*header);
 
-	for ( i=0; i < nname; i++) {
-		symbol_table[ i].on_foff += OFF_CHAR( *header);
-    }
+	for (i = 0, np = symbol_table; i < nname; i++, np++) {
+		np->on_foff += l;
+		if ((np->on_type & S_TYP) == S_CRS) {
+			np->on_valu += l;
+		}
+	}
 }
-
-
diff --git a/util/ceg/ce_back/obj_back/proto.make b/util/ceg/ce_back/obj_back/proto.make
index 393987488..4f004c23a 100644
--- a/util/ceg/ce_back/obj_back/proto.make
+++ b/util/ceg/ce_back/obj_back/proto.make
@@ -17,7 +17,8 @@ all:	data.$(SUF) con2.$(SUF) con4.$(SUF) relocation.$(SUF) end_back.$(SUF) \
 	reloc1.$(SUF) reloc2.$(SUF) reloc4.$(SUF) rom2.$(SUF) rom4.$(SUF) \
 	set_global.$(SUF) set_local.$(SUF) switchseg.$(SUF) symboldef.$(SUF) \
 	text2.$(SUF) text4.$(SUF) do_open.$(SUF) do_close.$(SUF) memory.$(SUF) \
-	label.$(SUF) misc.$(SUF) extnd.$(SUF) symtable.$(SUF) common.$(SUF)
+	label.$(SUF) misc.$(SUF) extnd.$(SUF) symtable.$(SUF) common.$(SUF) \
+	dbsym.$(SUF)
 
 data.$(SUF) : data.h back.h header.h $(SOURCE)/data.c
 	$(CC) $(CFLAGS) -c $(SOURCE)/data.c
@@ -106,3 +107,5 @@ label.$(SUF) : data.h back.h $(SRC_DIR)/mach.h $(SOURCE)/label.c
 common.$(SUF) : data.h back.h $(SRC_DIR)/mach.h $(SOURCE)/common.c
 	$(CC) $(CFLAGS) -c $(SOURCE)/common.c
 
+dbsym.$(SUF) : data.h back.h $(SRC_DIR)/mach.h $(SOURCE)/dbsym.c
+	$(CC) $(CFLAGS) -c $(SOURCE)/dbsym.c
diff --git a/util/ceg/ce_back/obj_back/symtable.c b/util/ceg/ce_back/obj_back/symtable.c
index db324a96e..8733392e3 100644
--- a/util/ceg/ce_back/obj_back/symtable.c
+++ b/util/ceg/ce_back/obj_back/symtable.c
@@ -45,7 +45,8 @@ int isdef;
 	register struct Hashitem *ip;
 	register int h;
 
-	if ( index_symbol_table != -1 )	{
+	if (isdef != FORCE_DEF) {
+	    if ( index_symbol_table != -1 )	{
 		s = symbol_table + index_symbol_table;
 		if ( sym == s->on_foff + string_area)  {
 			if ( (s->on_valu == -2) && ( isdef == REFERENCE)) {
@@ -54,10 +55,10 @@ int isdef;
 			}
 	        	return( index_symbol_table);
 		}
-	}
+	    }
 
-	h = Hash(sym);
-	for ( ip = Hashtab[h] + Hashitems ; ip != Hashitems; 
+	    h = Hash(sym);
+	    for ( ip = Hashtab[h] + Hashitems ; ip != Hashitems; 
 					  ip = (ip->hs_next) + Hashitems) {
 		register char *p = sym, *q;
 
@@ -70,26 +71,30 @@ int isdef;
 		        }
 		       	return ip->hs_nami;
 		}
+	    }
 	}
 	
 	if ( nname >= size_symbol)  
 		mem_symbol_hash();
 
 	s = symbol_table + nname;
-	ip = Hashitems + nname + 1;  /* skip the first entry */
 
-	if (isdef == REFERENCE)  {
+	if (isdef != FORCE_DEF) {
+	    ip = Hashitems + nname + 1;  /* skip the first entry */
+
+	    if (isdef == REFERENCE)  {
 		s->on_type = S_EXT; 
 		s->on_valu = -1;
-	}
-	if (isdef == STORE_STRING) {
+	    }
+	    if (isdef == STORE_STRING) {
 		s->on_type = S_UND;
 		s->on_valu = -2; 
-	}
+	    }
 
-	ip->hs_nami = nname;
-	ip->hs_next = Hashtab[h];
-	Hashtab[h] = ip - Hashitems;
+	    ip->hs_nami = nname;
+	    ip->hs_next = Hashtab[h];
+	    Hashtab[h] = ip - Hashitems;
+	}
 
 	if ( sym == string) 
 	        string += string_lengte;
diff --git a/util/ceg/ce_back/proto.make b/util/ceg/ce_back/proto.make
index 54423a3fd..25ff80c4f 100644
--- a/util/ceg/ce_back/proto.make
+++ b/util/ceg/ce_back/proto.make
@@ -11,14 +11,14 @@ ASLIST = back.h bottom.c bss.c con1.c con2.c con4.c \
 		do_close.c do_open.c end_back.c gen1.c gen2.c gen4.c header.h \
 		init_back.c reloc1.c reloc2.c reloc4.c rom1.c rom2.c rom4.c \
 		set_global.c set_local.c switchseg.c symboldef.c text1.c \
-		text2.c text4.c
+		text2.c text4.c dbsym.c
 
 OBJLIST = back.h con2.c con4.c data.c data.h do_close.c do_open.c \
 		end_back.c extnd.c gen1.c gen2.c gen4.c hash.h header.h \
 		init_back.c label.c memory.c misc.c output.c \
 		reloc1.c reloc2.c reloc4.c relocation.c rom2.c rom4.c \
 		set_global.c set_local.c switchseg.c symboldef.c symtable.c \
-		text2.c text4.c common.c
+		text2.c text4.c common.c dbsym.c
 
 all:
 
diff --git a/util/ceg/defaults/message/C_cst.c b/util/ceg/defaults/message/C_cst.c
index ca7682e3a..0118528b8 100644
--- a/util/ceg/defaults/message/C_cst.c
+++ b/util/ceg/defaults/message/C_cst.c
@@ -1,7 +1,26 @@
 #define CODE_EXPANDER
 #include <em.h>
+#include <stb.h>
+#include <em_mes.h>
+
+extern int __db_mes, __db_cst, __db_len, __db_type, __db_add;
+extern char *__db_str;
 
 C_cst( l)
 arith l;
 {
+	if (__db_mes) {
+		if (! __db_cst) __db_type = l;
+		else if (__db_cst == 1) {
+			if (__db_mes == ms_std) {
+				if (__db_type == N_SLINE) {
+					C_db_sline();
+				}
+				B_symd(__db_str, __db_len, __db_type, (int) l);
+			}
+			else __db_add = l;
+		}
+		else B_symbcst(__db_str, __db_len, __db_type, __db_add, l);
+		__db_cst++;
+	}
 }
diff --git a/util/ceg/defaults/message/C_dlb.c b/util/ceg/defaults/message/C_dlb.c
index 49746d87c..a6da60a99 100644
--- a/util/ceg/defaults/message/C_dlb.c
+++ b/util/ceg/defaults/message/C_dlb.c
@@ -1,8 +1,15 @@
 #define CODE_EXPANDER
 #include <em.h>
+#include "back.h"
+
+extern int __db_mes, __db_len, __db_type, __db_add;
+extern char *__db_str;
 
 C_dlb( l, val)
 label l;
-char *val;
+arith val;
 {
+	if (__db_mes) {
+		B_symbstr(__db_str, __db_len, __db_type, __db_add, extnd_dlb(l), val);
+	}
 }
diff --git a/util/ceg/defaults/message/C_dnam.c b/util/ceg/defaults/message/C_dnam.c
index c673ad6d6..5a9cac4d8 100644
--- a/util/ceg/defaults/message/C_dnam.c
+++ b/util/ceg/defaults/message/C_dnam.c
@@ -1,8 +1,15 @@
 #define CODE_EXPANDER
 #include <em.h>
+#include "back.h"
+
+extern int __db_mes, __db_len, __db_type, __db_add;
+extern char *__db_str;
 
 C_dnam( str, val)
 char *str;
 arith val;
 {
+	if (__db_mes) {
+		B_symbstr(__db_str, __db_len, __db_type, __db_add, extnd_dnam(str), val);
+	}
 }
diff --git a/util/ceg/defaults/message/C_ilb.c b/util/ceg/defaults/message/C_ilb.c
index 8d431ae39..091feb6f8 100644
--- a/util/ceg/defaults/message/C_ilb.c
+++ b/util/ceg/defaults/message/C_ilb.c
@@ -1,7 +1,16 @@
 #define CODE_EXPANDER
 #include <em.h>
+#include "back.h"
+
+extern int __db_mes, __db_len, __db_type, __db_add;
+extern char *__db_str;
+
+extern int B_procno;
 
 C_ilb( l)
 label l;
 {
+	if (__db_mes) {
+		B_symbstr(__db_str, __db_len, __db_type, __db_add, extnd_ilb(l, B_procno), (arith) 0);
+	}
 }
diff --git a/util/ceg/defaults/message/C_mes_begin.c b/util/ceg/defaults/message/C_mes_begin.c
index 773391b89..dedcbf85a 100644
--- a/util/ceg/defaults/message/C_mes_begin.c
+++ b/util/ceg/defaults/message/C_mes_begin.c
@@ -1,7 +1,16 @@
 #define CODE_EXPANDER
 #include <em.h>
+#include <em_mes.h>
+
+int __db_mes;
+char *__db_str = 0;
+int __db_len = 0;
+int __db_cst = 0;
+int __db_type;
+int __db_add;
 
 C_mes_begin( ms)
 int ms;
 {
+	__db_mes = (ms == ms_stb || ms == ms_std) ? ms : 0;
 }
diff --git a/util/ceg/defaults/message/C_mes_end.c b/util/ceg/defaults/message/C_mes_end.c
index 542124a44..cf303b732 100644
--- a/util/ceg/defaults/message/C_mes_end.c
+++ b/util/ceg/defaults/message/C_mes_end.c
@@ -1,6 +1,15 @@
 #define CODE_EXPANDER
 #include <em.h>
 
+extern int __db_mes;
+extern int __db_cst;
+extern char *__db_str;
+
 C_mes_end()
 {
+	if (__db_mes) {
+		__db_mes = 0;
+		__db_cst = 0;
+		__db_str = 0;
+	}
 }
diff --git a/util/ceg/defaults/message/C_pnam.c b/util/ceg/defaults/message/C_pnam.c
index af5b853be..117f3c2cb 100644
--- a/util/ceg/defaults/message/C_pnam.c
+++ b/util/ceg/defaults/message/C_pnam.c
@@ -1,7 +1,14 @@
 #define CODE_EXPANDER
 #include <em.h>
+#include "back.h"
+
+extern int __db_mes, __db_len, __db_type, __db_add;
+extern char *__db_str;
 
 C_pnam( str)
 char *str;
 {
+	if (__db_mes) {
+		B_symbstr(__db_str, __db_len, __db_type, __db_add, extnd_name(str), (arith) 0);
+	}
 }
diff --git a/util/ceg/defaults/message/C_scon.c b/util/ceg/defaults/message/C_scon.c
index 6d89bcd98..612cc4736 100644
--- a/util/ceg/defaults/message/C_scon.c
+++ b/util/ceg/defaults/message/C_scon.c
@@ -1,8 +1,16 @@
 #define CODE_EXPANDER
 #include <em.h>
 
+extern int __db_mes;
+extern char *__db_str;
+extern int __db_len;
+
 C_scon( str, siz)
 char *str;
 arith siz;
 {
+	if (__db_mes) {
+		__db_str = str;
+		__db_len = siz;
+	}
 }
diff --git a/util/ceg/defaults/not_impl/not_impl_table b/util/ceg/defaults/not_impl/not_impl_table
index d4923754d..7c0c9c483 100644
--- a/util/ceg/defaults/not_impl/not_impl_table
+++ b/util/ceg/defaults/not_impl/not_impl_table
@@ -268,3 +268,4 @@ C_bss_fcon	==>	not_implemented( "C_bss_fcon").
 C_hol_fcon	==>	not_implemented( "C_hol_fcon").
 C_con_fcon	==>	not_implemented( "C_con_fcon").
 C_exc	==>	not_implemented( "C_exc").
+C_db_sline	==>	.