@@ -1,7 +1,7 @@
-.\" $NetBSD: ptrace.2,v 1.56 2017/01/15 22:18:11 kamil Exp $
+.\" $NetBSD: ptrace.2,v 1.57 2017/01/25 17:12:56 kamil Exp $
.\"
.\" This file is in the public domain.
-.Dd January 14, 2016
+.Dd January 25, 2016
.Dt PTRACE 2
.Os
.Sh NAME
@@ -285,9 +285,16 @@
See the description of
.Dv PT_READ_I
for the difference between I and D spaces.
+.Pp
The
.Dv PIOD_READ_AUXV
operation can be used to read from the ELF auxiliary vector.
+The
+.Fa piod_offs
+argument sets offset withing the tracee's vector.
+To read from the beginning of it, this value must be set to 0 and casted to
+.Dv (void *) .
+.Pp
A pointer to the I/O descriptor is passed in the
.Fa addr
argument to