diff --git a/mach/mantra/libsys/head_em.s b/mach/mantra/libsys/head_em.s
index d8ce66df..149b1ec9 100644
--- a/mach/mantra/libsys/head_em.s
+++ b/mach/mantra/libsys/head_em.s
@@ -10,7 +10,7 @@
 
 
 
-! EM runtime start-off for the Bleasdale 68000 system
+! EM runtime start-off for the Mantra 68000 system
 
 
 LINO_AD	= 0
@@ -27,7 +27,7 @@ EBADGTO = 27
 
 	.sect .text
 begtext:
-	! Bleasdale puts the argument and environment vectors
+	! Mantra puts the argument and environment vectors
 	! themselves on top of the stack, instead of POINTERS
 	! to these vectors. We get things right here.
 	move.l	4(sp),a0
@@ -53,7 +53,8 @@ begtext:
 	jsr	_m_a_i_n
 	add	#012,sp
 EXIT:
-	jsr	__exit
+	move.l	d0,-(sp)
+	jsr	_exit
 
 	.sect .data
 begdata:
diff --git a/mach/pmds/libsys/head_em.s b/mach/pmds/libsys/head_em.s
index 6e410b2d..00dc1708 100644
--- a/mach/pmds/libsys/head_em.s
+++ b/mach/pmds/libsys/head_em.s
@@ -35,12 +35,11 @@ ECASE	= 20
 	.sect .text
 begtext:
 	add.l	#2,sp !convert argc from 4-byte to 2-byte
-	pea	endbss
-	jsr	_brk
-	add.l	#4,sp
 	jsr	_m_a_i_n
 	add	#010,sp
 EXIT:
+	move.w	d0,-(sp)
+	jsr	_exit
 
 	.sect .data
 begdata:
diff --git a/mach/pmds4/libsys/head_em.s b/mach/pmds4/libsys/head_em.s
index c3d67cc6..730c7b39 100644
--- a/mach/pmds4/libsys/head_em.s
+++ b/mach/pmds4/libsys/head_em.s
@@ -34,14 +34,12 @@ ECASE	= 20
 
 	.sect .text
 begtext:
-	pea	endbss
-	jsr	_brk
-	add.l	#4,sp
 	jsr	_m_a_i_n
 	add	#012,sp
 EXIT:
 
-	jsr __exit
+	move.l	d0,-(sp)
+	jsr _exit
 	! As a temporary measure
 	jsr .trp