2 files changed, 11 insertions(+), 2 deletions(-)

M port/portdat.h
M port/sysproc.c

@@ 315,7 315,8 @@ enum
 	SG_PHYSICAL	= 05,
 	SG_SHDATA	= 06,
 
-	SG_RONLY	= 040,		/* Segment is read only */
+	SG_RONLY	= 0040,		/* Segment is read only */
+	SG_CEXEC	= 0100,		/* Detach at exec */
 };
 
 #define PG_ONSWAP	1

@@ 330,7 330,15 @@ sysexec(ulong *arg)
 	 */
 	for(i = SSEG; i <= BSEG; i++) {
 		putseg(up->seg[i]);
-		up->seg[i] = 0;	    /* prevent a second free if we have an error */
+		/* prevent a second free if we have an error */
+		up->seg[i] = 0;
+	}
+	for(i = BSEG+1; i < NSEG; i++) {
+		s = up->seg[i];
+		if(s != 0 && (s->type&SG_CEXEC)) {
+			putseg(s);
+			up->seg[i] = 0;
+		}
 	}
 
 	/*