document core and stack
diff --git a/man/man1/db.1 b/man/man1/db.1
index 38c8fc1..5d0945d 100644
--- a/man/man1/db.1
+++ b/man/man1/db.1
@@ -14,6 +14,16 @@
|
.I corefile
]
+.PP
+.B stack
+[
+.I textfile
+]
+[
+.I pid
+|
+.I corefile
+]
.SH DESCRIPTION
.I Db
is a general purpose debugging program.
@@ -78,6 +88,13 @@
otherwise the map is undefined and accesses to it
are not permitted.
.PP
+.I Stack
+takes the same arguments as
+.IR db .
+It prints a stack trace (see the
+.B $c
+command below) and then exits.
+.PP
Commands to
.I db
are read from the standard input and
@@ -939,7 +956,8 @@
Beware that local variables may be stored in registers; see the
BUGS section.
.SH "SEE ALSO"
-.IR acid (1)
+.IR acid (1),
+.IR core (1)
.SH SOURCE
.B \*9/src/cmd/db
.SH DIAGNOSTICS
